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Date: Mon, 20 Sep 2010 14:43:25 -0700
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
torvalds@...ux-foundation.org, stable@...nel.org, lwn@....net
Subject: Re: Linux 2.6.32.22
diff --git a/Makefile b/Makefile
index 3e7196f..1786938 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 32
-EXTRAVERSION = .21
+EXTRAVERSION = .22
NAME = Man-Eating Seals of Antiquity
# *DOCUMENTATION*
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 2c1db77..a6c66f5 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -382,11 +382,13 @@ ENDPROC(sys_clone_wrapper)
sys_sigreturn_wrapper:
add r0, sp, #S_OFF
+ mov why, #0 @ prevent syscall restart handling
b sys_sigreturn
ENDPROC(sys_sigreturn_wrapper)
sys_rt_sigreturn_wrapper:
add r0, sp, #S_OFF
+ mov why, #0 @ prevent syscall restart handling
b sys_rt_sigreturn
ENDPROC(sys_rt_sigreturn_wrapper)
diff --git a/arch/ia64/include/asm/compat.h b/arch/ia64/include/asm/compat.h
index dfcf75b..c8662cd 100644
--- a/arch/ia64/include/asm/compat.h
+++ b/arch/ia64/include/asm/compat.h
@@ -198,7 +198,7 @@ ptr_to_compat(void __user *uptr)
}
static __inline__ void __user *
-compat_alloc_user_space (long len)
+arch_compat_alloc_user_space (long len)
{
struct pt_regs *regs = task_pt_regs(current);
return (void __user *) (((regs->r12 & 0xffffffff) & -16) - len);
diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c
index 6c89228..4a746ea 100644
--- a/arch/ia64/kernel/msi_ia64.c
+++ b/arch/ia64/kernel/msi_ia64.c
@@ -25,7 +25,7 @@ static int ia64_set_msi_irq_affinity(unsigned int irq,
if (irq_prepare_move(irq, cpu))
return -1;
- read_msi_msg(irq, &msg);
+ get_cached_msi_msg(irq, &msg);
addr = msg.address_lo;
addr &= MSI_ADDR_DEST_ID_MASK;
diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c
index fbbfb97..9ab2617 100644
--- a/arch/ia64/sn/kernel/msi_sn.c
+++ b/arch/ia64/sn/kernel/msi_sn.c
@@ -174,7 +174,7 @@ static int sn_set_msi_irq_affinity(unsigned int irq,
* Release XIO resources for the old MSI PCI address
*/
- read_msi_msg(irq, &msg);
+ get_cached_msi_msg(irq, &msg);
sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
pdev = sn_pdev->pdi_linux_pcidev;
provider = SN_PCIDEV_BUSPROVIDER(pdev);
diff --git a/arch/mips/include/asm/compat.h b/arch/mips/include/asm/compat.h
index f58aed3..27505bd 100644
--- a/arch/mips/include/asm/compat.h
+++ b/arch/mips/include/asm/compat.h
@@ -144,7 +144,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
-static inline void __user *compat_alloc_user_space(long len)
+static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = (struct pt_regs *)
((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index 7f32611..7c77fa9 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -146,7 +146,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
-static __inline__ void __user *compat_alloc_user_space(long len)
+static __inline__ void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = ¤t->thread.regs;
return (void __user *)regs->gr[30];
diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index 4774c2f..8d0fff3 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -133,7 +133,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
-static inline void __user *compat_alloc_user_space(long len)
+static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = current->thread.regs;
unsigned long usp = regs->gpr[1];
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index 01a0802..0c940d3 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -180,7 +180,7 @@ static inline int is_compat_task(void)
#endif
-static inline void __user *compat_alloc_user_space(long len)
+static inline void __user *arch_compat_alloc_user_space(long len)
{
unsigned long stack;
diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h
index 0e70625..612bb38 100644
--- a/arch/sparc/include/asm/compat.h
+++ b/arch/sparc/include/asm/compat.h
@@ -166,7 +166,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
-static inline void __user *compat_alloc_user_space(long len)
+static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = current_thread_info()->kregs;
unsigned long usp = regs->u_regs[UREG_I6];
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 5294d84..4edd8eb 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -50,7 +50,12 @@
/*
* Reload arg registers from stack in case ptrace changed them.
* We don't reload %eax because syscall_trace_enter() returned
- * the value it wants us to use in the table lookup.
+ * the %rax value we should see. Instead, we just truncate that
+ * value to 32 bits again as we did on entry from user mode.
+ * If it's a new value set by user_regset during entry tracing,
+ * this matches the normal truncation of the user-mode value.
+ * If it's -1 to make us punt the syscall, then (u32)-1 is still
+ * an appropriately invalid value.
*/
.macro LOAD_ARGS32 offset, _r9=0
.if \_r9
@@ -60,6 +65,7 @@
movl \offset+48(%rsp),%edx
movl \offset+56(%rsp),%esi
movl \offset+64(%rsp),%edi
+ movl %eax,%eax /* zero extension */
.endm
.macro CFI_STARTPROC32 simple
@@ -153,7 +159,7 @@ ENTRY(ia32_sysenter_target)
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
CFI_REMEMBER_STATE
jnz sysenter_tracesys
- cmpl $(IA32_NR_syscalls-1),%eax
+ cmpq $(IA32_NR_syscalls-1),%rax
ja ia32_badsys
sysenter_do_call:
IA32_ARG_FIXUP
@@ -195,7 +201,7 @@ sysexit_from_sys_call:
movl $AUDIT_ARCH_I386,%edi /* 1st arg: audit arch */
call audit_syscall_entry
movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall number */
- cmpl $(IA32_NR_syscalls-1),%eax
+ cmpq $(IA32_NR_syscalls-1),%rax
ja ia32_badsys
movl %ebx,%edi /* reload 1st syscall arg */
movl RCX-ARGOFFSET(%rsp),%esi /* reload 2nd syscall arg */
@@ -248,7 +254,7 @@ sysenter_tracesys:
call syscall_trace_enter
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
- cmpl $(IA32_NR_syscalls-1),%eax
+ cmpq $(IA32_NR_syscalls-1),%rax
ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
jmp sysenter_do_call
CFI_ENDPROC
@@ -314,7 +320,7 @@ ENTRY(ia32_cstar_target)
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
CFI_REMEMBER_STATE
jnz cstar_tracesys
- cmpl $IA32_NR_syscalls-1,%eax
+ cmpq $IA32_NR_syscalls-1,%rax
ja ia32_badsys
cstar_do_call:
IA32_ARG_FIXUP 1
@@ -367,7 +373,7 @@ cstar_tracesys:
LOAD_ARGS32 ARGOFFSET, 1 /* reload args from stack in case ptrace changed it */
RESTORE_REST
xchgl %ebp,%r9d
- cmpl $(IA32_NR_syscalls-1),%eax
+ cmpq $(IA32_NR_syscalls-1),%rax
ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
jmp cstar_do_call
END(ia32_cstar_target)
@@ -425,7 +431,7 @@ ENTRY(ia32_syscall)
orl $TS_COMPAT,TI_status(%r10)
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
jnz ia32_tracesys
- cmpl $(IA32_NR_syscalls-1),%eax
+ cmpq $(IA32_NR_syscalls-1),%rax
ja ia32_badsys
ia32_do_call:
IA32_ARG_FIXUP
@@ -444,7 +450,7 @@ ia32_tracesys:
call syscall_trace_enter
LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
- cmpl $(IA32_NR_syscalls-1),%eax
+ cmpq $(IA32_NR_syscalls-1),%rax
ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */
jmp ia32_do_call
END(ia32_syscall)
diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h
index 9a9c7bd..c8c9a74 100644
--- a/arch/x86/include/asm/compat.h
+++ b/arch/x86/include/asm/compat.h
@@ -204,7 +204,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
-static inline void __user *compat_alloc_user_space(long len)
+static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = task_pt_regs(current);
return (void __user *)regs->sp - len;
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h
index c042729..1ca132f 100644
--- a/arch/x86/include/asm/tsc.h
+++ b/arch/x86/include/asm/tsc.h
@@ -59,5 +59,7 @@ extern void check_tsc_sync_source(int cpu);
extern void check_tsc_sync_target(void);
extern int notsc_setup(char *);
+extern void save_sched_clock_state(void);
+extern void restore_sched_clock_state(void);
#endif /* _ASM_X86_TSC_H */
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 1acd1c4..0da6495 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3338,7 +3338,7 @@ static int set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
cfg = desc->chip_data;
- read_msi_msg_desc(desc, &msg);
+ get_cached_msi_msg_desc(desc, &msg);
msg.data &= ~MSI_DATA_VECTOR_MASK;
msg.data |= MSI_DATA_VECTOR(cfg->vector);
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 597683a..aaefa71 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -626,6 +626,44 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
local_irq_restore(flags);
}
+static unsigned long long cyc2ns_suspend;
+
+void save_sched_clock_state(void)
+{
+ if (!sched_clock_stable)
+ return;
+
+ cyc2ns_suspend = sched_clock();
+}
+
+/*
+ * Even on processors with invariant TSC, TSC gets reset in some the
+ * ACPI system sleep states. And in some systems BIOS seem to reinit TSC to
+ * arbitrary value (still sync'd across cpu's) during resume from such sleep
+ * states. To cope up with this, recompute the cyc2ns_offset for each cpu so
+ * that sched_clock() continues from the point where it was left off during
+ * suspend.
+ */
+void restore_sched_clock_state(void)
+{
+ unsigned long long offset;
+ unsigned long flags;
+ int cpu;
+
+ if (!sched_clock_stable)
+ return;
+
+ local_irq_save(flags);
+
+ __get_cpu_var(cyc2ns_offset) = 0;
+ offset = cyc2ns_suspend - sched_clock();
+
+ for_each_possible_cpu(cpu)
+ per_cpu(cyc2ns_offset, cpu) = offset;
+
+ local_irq_restore(flags);
+}
+
#ifdef CONFIG_CPU_FREQ
/* Frequency scaling support. Adjust the TSC based timer when the cpu frequency
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index c41ad50..3130a4b 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -518,8 +518,13 @@ static int __init init_sysfs(void)
int error;
error = sysdev_class_register(&oprofile_sysclass);
- if (!error)
- error = sysdev_register(&device_oprofile);
+ if (error)
+ return error;
+
+ error = sysdev_register(&device_oprofile);
+ if (error)
+ sysdev_class_unregister(&oprofile_sysclass);
+
return error;
}
@@ -530,8 +535,10 @@ static void exit_sysfs(void)
}
#else
-#define init_sysfs() do { } while (0)
-#define exit_sysfs() do { } while (0)
+
+static inline int init_sysfs(void) { return 0; }
+static inline void exit_sysfs(void) { }
+
#endif /* CONFIG_PM */
static int __init p4_init(char **cpu_type)
@@ -645,6 +652,8 @@ int __init op_nmi_init(struct oprofile_operations *ops)
char *cpu_type = NULL;
int ret = 0;
+ using_nmi = 0;
+
if (!cpu_has_apic)
return -ENODEV;
@@ -727,7 +736,10 @@ int __init op_nmi_init(struct oprofile_operations *ops)
mux_init(ops);
- init_sysfs();
+ ret = init_sysfs();
+ if (ret)
+ return ret;
+
using_nmi = 1;
printk(KERN_INFO "oprofile: using NMI interrupt.\n");
return 0;
diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
index eeeb522..fa0f651 100644
--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -112,6 +112,7 @@ static void __save_processor_state(struct saved_context *ctxt)
void save_processor_state(void)
{
__save_processor_state(&saved_context);
+ save_sched_clock_state();
}
#ifdef CONFIG_X86_32
EXPORT_SYMBOL(save_processor_state);
@@ -253,6 +254,7 @@ static void __restore_processor_state(struct saved_context *ctxt)
void restore_processor_state(void)
{
__restore_processor_state(&saved_context);
+ restore_sched_clock_state();
}
#ifdef CONFIG_X86_32
EXPORT_SYMBOL(restore_processor_state);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6a96da6..0963cd6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5504,6 +5504,7 @@ static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
*/
int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
{
+ unsigned int ehi_flags = ATA_EHI_QUIET;
int rc;
/*
@@ -5512,7 +5513,18 @@ int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
*/
ata_lpm_enable(host);
- rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
+ /*
+ * On some hardware, device fails to respond after spun down
+ * for suspend. As the device won't be used before being
+ * resumed, we don't need to touch the device. Ask EH to skip
+ * the usual stuff and proceed directly to suspend.
+ *
+ * http://thread.gmane.org/gmane.linux.ide/46764
+ */
+ if (mesg.event == PM_EVENT_SUSPEND)
+ ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
+
+ rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1);
if (rc == 0)
host->dev->power.power_state = mesg;
return rc;
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index e30b9e7..fa9bed0 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3149,6 +3149,10 @@ static int ata_eh_skip_recovery(struct ata_link *link)
if (link->flags & ATA_LFLAG_DISABLED)
return 1;
+ /* skip if explicitly requested */
+ if (ehc->i.flags & ATA_EHI_NO_RECOVERY)
+ return 1;
+
/* thaw frozen port and recover failed devices */
if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link))
return 0;
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 6f5093b..cf41126 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1879,19 +1879,25 @@ static void mv_bmdma_start(struct ata_queued_cmd *qc)
* LOCKING:
* Inherited from caller.
*/
-static void mv_bmdma_stop(struct ata_queued_cmd *qc)
+static void mv_bmdma_stop_ap(struct ata_port *ap)
{
- struct ata_port *ap = qc->ap;
void __iomem *port_mmio = mv_ap_base(ap);
u32 cmd;
/* clear start/stop bit */
cmd = readl(port_mmio + BMDMA_CMD);
- cmd &= ~ATA_DMA_START;
- writelfl(cmd, port_mmio + BMDMA_CMD);
+ if (cmd & ATA_DMA_START) {
+ cmd &= ~ATA_DMA_START;
+ writelfl(cmd, port_mmio + BMDMA_CMD);
+
+ /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
+ ata_sff_dma_pause(ap);
+ }
+}
- /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
- ata_sff_dma_pause(ap);
+static void mv_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ mv_bmdma_stop_ap(qc->ap);
}
/**
@@ -1915,8 +1921,21 @@ static u8 mv_bmdma_status(struct ata_port *ap)
reg = readl(port_mmio + BMDMA_STATUS);
if (reg & ATA_DMA_ACTIVE)
status = ATA_DMA_ACTIVE;
- else
+ else if (reg & ATA_DMA_ERR)
status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR;
+ else {
+ /*
+ * Just because DMA_ACTIVE is 0 (DMA completed),
+ * this does _not_ mean the device is "done".
+ * So we should not yet be signalling ATA_DMA_INTR
+ * in some cases. Eg. DSM/TRIM, and perhaps others.
+ */
+ mv_bmdma_stop_ap(ap);
+ if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY)
+ status = 0;
+ else
+ status = ATA_DMA_INTR;
+ }
return status;
}
@@ -1976,6 +1995,9 @@ static void mv_qc_prep(struct ata_queued_cmd *qc)
switch (tf->protocol) {
case ATA_PROT_DMA:
+ if (tf->command == ATA_CMD_DSM)
+ return;
+ /* fall-thru */
case ATA_PROT_NCQ:
break; /* continue below */
case ATA_PROT_PIO:
@@ -2075,6 +2097,8 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
if ((tf->protocol != ATA_PROT_DMA) &&
(tf->protocol != ATA_PROT_NCQ))
return;
+ if (tf->command == ATA_CMD_DSM)
+ return; /* use bmdma for this */
/* Fill in Gen IIE command request block */
if (!(tf->flags & ATA_TFLAG_WRITE))
@@ -2270,6 +2294,12 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
+ if (qc->tf.command == ATA_CMD_DSM) {
+ if (!ap->ops->bmdma_setup) /* no bmdma on GEN_I */
+ return AC_ERR_OTHER;
+ break; /* use bmdma for this */
+ }
+ /* fall thru */
case ATA_PROT_NCQ:
mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 08173fc..1b8745d 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -925,13 +925,13 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
mode_changed = true;
if (mode_changed) {
- old_fb = set->crtc->fb;
- set->crtc->fb = set->fb;
set->crtc->enabled = (set->mode != NULL);
if (set->mode != NULL) {
DRM_DEBUG_KMS("attempting to set mode from"
" userspace\n");
drm_mode_debug_printmodeline(set->mode);
+ old_fb = set->crtc->fb;
+ set->crtc->fb = set->fb;
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
set->x, set->y,
old_fb)) {
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 2680db7..c3aca5c 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -683,8 +683,10 @@ static int i915_batchbuffer(struct drm_device *dev, void *data,
ret = copy_from_user(cliprects, batch->cliprects,
batch->num_cliprects *
sizeof(struct drm_clip_rect));
- if (ret != 0)
+ if (ret != 0) {
+ ret = -EFAULT;
goto fail_free;
+ }
}
mutex_lock(&dev->struct_mutex);
@@ -725,8 +727,10 @@ static int i915_cmdbuffer(struct drm_device *dev, void *data,
return -ENOMEM;
ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
- if (ret != 0)
+ if (ret != 0) {
+ ret = -EFAULT;
goto fail_batch_free;
+ }
if (cmdbuf->num_cliprects) {
cliprects = kcalloc(cmdbuf->num_cliprects,
@@ -737,8 +741,10 @@ static int i915_cmdbuffer(struct drm_device *dev, void *data,
ret = copy_from_user(cliprects, cmdbuf->cliprects,
cmdbuf->num_cliprects *
sizeof(struct drm_clip_rect));
- if (ret != 0)
+ if (ret != 0) {
+ ret = -EFAULT;
goto fail_clip_free;
+ }
}
mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 176a6df..3ada62b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3667,6 +3667,7 @@ i915_gem_execbuffer(struct drm_device *dev, void *data,
if (ret != 0) {
DRM_ERROR("copy %d cliprects failed: %d\n",
args->num_cliprects, ret);
+ ret = -EFAULT;
goto pre_mutex_err;
}
}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4f5c733..79cc437 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1954,6 +1954,9 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
int pipe = intel_crtc->pipe;
bool enabled;
+ if (intel_crtc->dpms_mode == mode)
+ return;
+
dev_priv->display.dpms(crtc, mode);
intel_crtc->dpms_mode = mode;
@@ -4000,7 +4003,7 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
}
intel_crtc->cursor_addr = 0;
- intel_crtc->dpms_mode = DRM_MODE_DPMS_OFF;
+ intel_crtc->dpms_mode = -1;
drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
intel_crtc->busy = false;
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 1ca6574..e9add5b 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1000,16 +1000,6 @@ static int usbhid_start(struct hid_device *hid)
}
}
- init_waitqueue_head(&usbhid->wait);
- INIT_WORK(&usbhid->reset_work, hid_reset);
- INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
- setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
-
- spin_lock_init(&usbhid->lock);
-
- usbhid->intf = intf;
- usbhid->ifnum = interface->desc.bInterfaceNumber;
-
usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
if (!usbhid->urbctrl) {
ret = -ENOMEM;
@@ -1180,6 +1170,14 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *
hid->driver_data = usbhid;
usbhid->hid = hid;
+ usbhid->intf = intf;
+ usbhid->ifnum = interface->desc.bInterfaceNumber;
+
+ init_waitqueue_head(&usbhid->wait);
+ INIT_WORK(&usbhid->reset_work, hid_reset);
+ INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
+ setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
+ spin_lock_init(&usbhid->lock);
ret = hid_add_device(hid);
if (ret) {
diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index e2107e5..afebc34 100644
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -79,7 +79,7 @@ I2C_CLIENT_INSMOD_2(f75373, f75375);
#define F75375_REG_PWM2_DROP_DUTY 0x6C
#define FAN_CTRL_LINEAR(nr) (4 + nr)
-#define FAN_CTRL_MODE(nr) (5 + ((nr) * 2))
+#define FAN_CTRL_MODE(nr) (4 + ((nr) * 2))
/*
* Data structures and manipulation thereof
@@ -298,7 +298,7 @@ static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
return -EINVAL;
fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
- fanmode = ~(3 << FAN_CTRL_MODE(nr));
+ fanmode &= ~(3 << FAN_CTRL_MODE(nr));
switch (val) {
case 0: /* Full speed */
@@ -350,7 +350,7 @@ static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
mutex_lock(&data->update_lock);
conf = f75375_read8(client, F75375_REG_CONFIG1);
- conf = ~(1 << FAN_CTRL_LINEAR(nr));
+ conf &= ~(1 << FAN_CTRL_LINEAR(nr));
if (val == 0)
conf |= (1 << FAN_CTRL_LINEAR(nr)) ;
diff --git a/drivers/hwmon/k8temp.c b/drivers/hwmon/k8temp.c
index f808d18..4f84d1a 100644
--- a/drivers/hwmon/k8temp.c
+++ b/drivers/hwmon/k8temp.c
@@ -143,6 +143,37 @@ static struct pci_device_id k8temp_ids[] = {
MODULE_DEVICE_TABLE(pci, k8temp_ids);
+static int __devinit is_rev_g_desktop(u8 model)
+{
+ u32 brandidx;
+
+ if (model < 0x69)
+ return 0;
+
+ if (model == 0xc1 || model == 0x6c || model == 0x7c)
+ return 0;
+
+ /*
+ * Differentiate between AM2 and ASB1.
+ * See "Constructing the processor Name String" in "Revision
+ * Guide for AMD NPT Family 0Fh Processors" (33610).
+ */
+ brandidx = cpuid_ebx(0x80000001);
+ brandidx = (brandidx >> 9) & 0x1f;
+
+ /* Single core */
+ if ((model == 0x6f || model == 0x7f) &&
+ (brandidx == 0x7 || brandidx == 0x9 || brandidx == 0xc))
+ return 0;
+
+ /* Dual core */
+ if (model == 0x6b &&
+ (brandidx == 0xb || brandidx == 0xc))
+ return 0;
+
+ return 1;
+}
+
static int __devinit k8temp_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
@@ -179,9 +210,7 @@ static int __devinit k8temp_probe(struct pci_dev *pdev,
"wrong - check erratum #141\n");
}
- if ((model >= 0x69) &&
- !(model == 0xc1 || model == 0x6c || model == 0x7c ||
- model == 0x6b || model == 0x6f || model == 0x7f)) {
+ if (is_rev_g_desktop(model)) {
/*
* RevG desktop CPUs (i.e. no socket S1G1 or
* ASB1 parts) need additional offset,
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 1df02d2..16f5ab2 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1412,8 +1412,8 @@ static int __init i8042_init(void)
static void __exit i8042_exit(void)
{
- platform_driver_unregister(&i8042_driver);
platform_device_unregister(i8042_platform_device);
+ platform_driver_unregister(&i8042_driver);
i8042_platform_exit();
panic_blink = NULL;
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 91991b4..f43edfd 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -161,6 +161,7 @@ tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
{
struct mmc_data *data = host->data;
+ void *sg_virt;
unsigned short *buf;
unsigned int count;
unsigned long flags;
@@ -170,8 +171,8 @@ static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
return;
}
- buf = (unsigned short *)(tmio_mmc_kmap_atomic(host, &flags) +
- host->sg_off);
+ sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
+ buf = (unsigned short *)(sg_virt + host->sg_off);
count = host->sg_ptr->length - host->sg_off;
if (count > data->blksz)
@@ -188,7 +189,7 @@ static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
host->sg_off += count;
- tmio_mmc_kunmap_atomic(host, &flags);
+ tmio_mmc_kunmap_atomic(sg_virt, &flags);
if (host->sg_off == host->sg_ptr->length)
tmio_mmc_next_sg(host);
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 9fa9985..ee8fa89 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -102,10 +102,7 @@
#define ack_mmc_irqs(host, i) \
do { \
- u32 mask;\
- mask = sd_ctrl_read32((host), CTL_STATUS); \
- mask &= ~((i) & TMIO_MASK_IRQ); \
- sd_ctrl_write32((host), CTL_STATUS, mask); \
+ sd_ctrl_write32((host), CTL_STATUS, ~(i)); \
} while (0)
@@ -200,19 +197,17 @@ static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host)
return --host->sg_len;
}
-static inline char *tmio_mmc_kmap_atomic(struct tmio_mmc_host *host,
+static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
unsigned long *flags)
{
- struct scatterlist *sg = host->sg_ptr;
-
local_irq_save(*flags);
return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
}
-static inline void tmio_mmc_kunmap_atomic(struct tmio_mmc_host *host,
+static inline void tmio_mmc_kunmap_atomic(void *virt,
unsigned long *flags)
{
- kunmap_atomic(sg_page(host->sg_ptr), KM_BIO_SRC_IRQ);
+ kunmap_atomic(virt, KM_BIO_SRC_IRQ);
local_irq_restore(*flags);
}
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 4fdfa2a..0f77aca 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1006,7 +1006,8 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
if (err < 0)
goto err_free_sk;
- if (device_create_file(&tun->dev->dev, &dev_attr_tun_flags) ||
+ if (!net_eq(dev_net(tun->dev), &init_net) ||
+ device_create_file(&tun->dev->dev, &dev_attr_tun_flags) ||
device_create_file(&tun->dev->dev, &dev_attr_owner) ||
device_create_file(&tun->dev->dev, &dev_attr_group))
printk(KERN_ERR "Failed to create tun sysfs files\n");
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index ce166ae..2c4914a 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -1288,6 +1288,10 @@ ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
PCI_DMA_TODEVICE);
rate = ieee80211_get_tx_rate(sc->hw, info);
+ if (!rate) {
+ ret = -EINVAL;
+ goto err_unmap;
+ }
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
flags |= AR5K_TXDESC_NOACK;
diff --git a/drivers/net/wireless/ath/ath9k/eeprom.h b/drivers/net/wireless/ath/ath9k/eeprom.h
index 4fe33f7..a5daa0d 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/eeprom.h
@@ -60,7 +60,7 @@
#define SD_NO_CTL 0xE0
#define NO_CTL 0xff
-#define CTL_MODE_M 7
+#define CTL_MODE_M 0xf
#define CTL_11A 0
#define CTL_11B 1
#define CTL_11G 2
diff --git a/drivers/net/wireless/ath/regd.h b/drivers/net/wireless/ath/regd.h
index c1dd857..21cf521 100644
--- a/drivers/net/wireless/ath/regd.h
+++ b/drivers/net/wireless/ath/regd.h
@@ -31,7 +31,6 @@ enum ctl_group {
#define NO_CTL 0xff
#define SD_NO_CTL 0xE0
#define NO_CTL 0xff
-#define CTL_MODE_M 7
#define CTL_11A 0
#define CTL_11B 1
#define CTL_11G 2
diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c
index 9d147de..0edd7b4 100644
--- a/drivers/net/wireless/p54/txrx.c
+++ b/drivers/net/wireless/p54/txrx.c
@@ -445,7 +445,7 @@ static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb)
}
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
- (!payload->status))
+ !(payload->status & P54_TX_FAILED))
info->flags |= IEEE80211_TX_STAT_ACK;
if (payload->status & P54_TX_PSM_CANCELLED)
info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index c9e2ae9..5c4df24 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -140,16 +140,6 @@ static struct notifier_block module_load_nb = {
.notifier_call = module_load_notify,
};
-
-static void end_sync(void)
-{
- end_cpu_work();
- /* make sure we don't leak task structs */
- process_task_mortuary();
- process_task_mortuary();
-}
-
-
int sync_start(void)
{
int err;
@@ -157,7 +147,7 @@ int sync_start(void)
if (!zalloc_cpumask_var(&marked_cpus, GFP_KERNEL))
return -ENOMEM;
- start_cpu_work();
+ mutex_lock(&buffer_mutex);
err = task_handoff_register(&task_free_nb);
if (err)
@@ -172,7 +162,10 @@ int sync_start(void)
if (err)
goto out4;
+ start_cpu_work();
+
out:
+ mutex_unlock(&buffer_mutex);
return err;
out4:
profile_event_unregister(PROFILE_MUNMAP, &munmap_nb);
@@ -181,7 +174,6 @@ out3:
out2:
task_handoff_unregister(&task_free_nb);
out1:
- end_sync();
free_cpumask_var(marked_cpus);
goto out;
}
@@ -189,11 +181,20 @@ out1:
void sync_stop(void)
{
+ /* flush buffers */
+ mutex_lock(&buffer_mutex);
+ end_cpu_work();
unregister_module_notifier(&module_load_nb);
profile_event_unregister(PROFILE_MUNMAP, &munmap_nb);
profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb);
task_handoff_unregister(&task_free_nb);
- end_sync();
+ mutex_unlock(&buffer_mutex);
+ flush_scheduled_work();
+
+ /* make sure we don't leak task structs */
+ process_task_mortuary();
+ process_task_mortuary();
+
free_cpumask_var(marked_cpus);
}
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index 1f1f5a8..5e2ac4a 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -121,8 +121,6 @@ void end_cpu_work(void)
cancel_delayed_work(&b->work);
}
-
- flush_scheduled_work();
}
/*
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index f9cf317..0fb1d05 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -195,6 +195,9 @@ void unmask_msi_irq(unsigned int irq)
void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
+
+ BUG_ON(entry->dev->current_state != PCI_D0);
+
if (entry->msi_attrib.is_msix) {
void __iomem *base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
@@ -228,10 +231,32 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg)
read_msi_msg_desc(desc, msg);
}
+void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
+{
+ struct msi_desc *entry = get_irq_desc_msi(desc);
+
+ /* Assert that the cache is valid, assuming that
+ * valid messages are not all-zeroes. */
+ BUG_ON(!(entry->msg.address_hi | entry->msg.address_lo |
+ entry->msg.data));
+
+ *msg = entry->msg;
+}
+
+void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ get_cached_msi_msg_desc(desc, msg);
+}
+
void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
- if (entry->msi_attrib.is_msix) {
+
+ if (entry->dev->current_state != PCI_D0) {
+ /* Don't touch the hardware now */
+ } else if (entry->msi_attrib.is_msix) {
void __iomem *base;
base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
diff --git a/drivers/power/apm_power.c b/drivers/power/apm_power.c
index 936bae5..dc628cb 100644
--- a/drivers/power/apm_power.c
+++ b/drivers/power/apm_power.c
@@ -233,6 +233,7 @@ static int calculate_capacity(enum apm_source source)
empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
+ break;
case SOURCE_VOLTAGE:
full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
diff --git a/drivers/staging/hv/RingBuffer.c b/drivers/staging/hv/RingBuffer.c
index f69ae33..3a38103 100644
--- a/drivers/staging/hv/RingBuffer.c
+++ b/drivers/staging/hv/RingBuffer.c
@@ -192,7 +192,7 @@ Description:
static inline u64
GetRingBufferIndices(RING_BUFFER_INFO* RingInfo)
{
- return ((u64)RingInfo->RingBuffer->WriteIndex << 32) || RingInfo->RingBuffer->ReadIndex;
+ return (u64)RingInfo->RingBuffer->WriteIndex << 32;
}
diff --git a/drivers/staging/hv/StorVscApi.h b/drivers/staging/hv/StorVscApi.h
index 69c1406..3d8ff08 100644
--- a/drivers/staging/hv/StorVscApi.h
+++ b/drivers/staging/hv/StorVscApi.h
@@ -28,10 +28,10 @@
#include "VmbusApi.h"
/* Defines */
-#define STORVSC_RING_BUFFER_SIZE (10*PAGE_SIZE)
+#define STORVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
#define BLKVSC_RING_BUFFER_SIZE (20*PAGE_SIZE)
-#define STORVSC_MAX_IO_REQUESTS 64
+#define STORVSC_MAX_IO_REQUESTS 128
/*
* In Hyper-V, each port/path/target maps to 1 scsi host adapter. In
diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 4c3c8bc..547261d 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -392,6 +392,9 @@ static const struct net_device_ops device_ops = {
.ndo_start_xmit = netvsc_start_xmit,
.ndo_get_stats = netvsc_get_stats,
.ndo_set_multicast_list = netvsc_set_multicast_list,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
};
static int netvsc_probe(struct device *device)
diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c
index d49dc21..2a4b147 100644
--- a/drivers/staging/hv/storvsc_drv.c
+++ b/drivers/staging/hv/storvsc_drv.c
@@ -532,7 +532,7 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl,
ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE);
- if (j == 0)
+ if (bounce_addr == 0)
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
while (srclen) {
@@ -593,7 +593,7 @@ static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
destlen = orig_sgl[i].length;
ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE);
- if (j == 0)
+ if (bounce_addr == 0)
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
while (destlen) {
@@ -652,6 +652,7 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd,
unsigned int request_size = 0;
int i;
struct scatterlist *sgl;
+ unsigned int sg_count = 0;
DPRINT_ENTER(STORVSC_DRV);
@@ -736,6 +737,7 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd,
request->DataBuffer.Length = scsi_bufflen(scmnd);
if (scsi_sg_count(scmnd)) {
sgl = (struct scatterlist *)scsi_sglist(scmnd);
+ sg_count = scsi_sg_count(scmnd);
/* check if we need to bounce the sgl */
if (do_bounce_buffer(sgl, scsi_sg_count(scmnd)) != -1) {
@@ -770,11 +772,12 @@ static int storvsc_queuecommand(struct scsi_cmnd *scmnd,
scsi_sg_count(scmnd));
sgl = cmd_request->bounce_sgl;
+ sg_count = cmd_request->bounce_sgl_count;
}
request->DataBuffer.Offset = sgl[0].offset;
- for (i = 0; i < scsi_sg_count(scmnd); i++) {
+ for (i = 0; i < sg_count; i++) {
DPRINT_DBG(STORVSC_DRV, "sgl[%d] len %d offset %d \n",
i, sgl[i].length, sgl[i].offset);
request->DataBuffer.PfnArray[i] =
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 0e64037..e3017c4 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -971,7 +971,8 @@ static int acm_probe(struct usb_interface *intf,
}
if (!buflen) {
- if (intf->cur_altsetting->endpoint->extralen &&
+ if (intf->cur_altsetting->endpoint &&
+ intf->cur_altsetting->endpoint->extralen &&
intf->cur_altsetting->endpoint->extra) {
dev_dbg(&intf->dev,
"Seeking extra descriptors on endpoint\n");
@@ -1464,6 +1465,17 @@ err_out:
}
#endif /* CONFIG_PM */
+
+#define NOKIA_PCSUITE_ACM_INFO(x) \
+ USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
+ USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
+ USB_CDC_ACM_PROTO_VENDOR)
+
+#define SAMSUNG_PCSUITE_ACM_INFO(x) \
+ USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
+ USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
+ USB_CDC_ACM_PROTO_VENDOR)
+
/*
* USB driver structure.
*/
@@ -1521,6 +1533,76 @@ static struct usb_device_id acm_ids[] = {
{ USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
+ { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
+ .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
+ },
+
+ /* Nokia S60 phones expose two ACM channels. The first is
+ * a modem and is picked up by the standard AT-command
+ * information below. The second is 'vendor-specific' but
+ * is treated as a serial device at the S60 end, so we want
+ * to expose it on Linux too. */
+ { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
+ { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
+ { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
+ { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
+ { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
+ { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
+ { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
+ { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
+ { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
+ { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
+ { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
+ { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
+ { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
+ { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
+ { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
+ { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
+ { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
+ { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
+ { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
+ { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
+ { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
+ { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
+ { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
+ { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
+ { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
+ { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
+ { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
+ { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
+ { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
+ { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
+ { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
+ { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
+ { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
+ { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
+ { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
+ { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
+ { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
+ { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
+ { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
+ { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
+ { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
+
+ /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
+
+ /* control interfaces without any protocol set */
+ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+ USB_CDC_PROTO_NONE) },
/* control interfaces with various AT-command sets */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
@@ -1536,7 +1618,6 @@ static struct usb_device_id acm_ids[] = {
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_CDMA) },
- /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */
{ }
};
diff --git a/drivers/usb/gadget/rndis.c b/drivers/usb/gadget/rndis.c
index 48267bc..33ac6ac 100644
--- a/drivers/usb/gadget/rndis.c
+++ b/drivers/usb/gadget/rndis.c
@@ -291,9 +291,13 @@ gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
/* mandatory */
case OID_GEN_VENDOR_DESCRIPTION:
pr_debug("%s: OID_GEN_VENDOR_DESCRIPTION\n", __func__);
- length = strlen (rndis_per_dev_params [configNr].vendorDescr);
- memcpy (outbuf,
- rndis_per_dev_params [configNr].vendorDescr, length);
+ if ( rndis_per_dev_params [configNr].vendorDescr ) {
+ length = strlen (rndis_per_dev_params [configNr].vendorDescr);
+ memcpy (outbuf,
+ rndis_per_dev_params [configNr].vendorDescr, length);
+ } else {
+ outbuf[0] = 0;
+ }
retval = 0;
break;
diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
index 36f96da..ab26c2b 100644
--- a/drivers/usb/host/ehci-ppc-of.c
+++ b/drivers/usb/host/ehci-ppc-of.c
@@ -192,17 +192,19 @@ ehci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match)
}
rv = usb_add_hcd(hcd, irq, 0);
- if (rv == 0)
- return 0;
+ if (rv)
+ goto err_ehci;
+
+ return 0;
+err_ehci:
+ if (ehci->has_amcc_usb23)
+ iounmap(ehci->ohci_hcctrl_reg);
iounmap(hcd->regs);
err_ioremap:
irq_dispose_mapping(irq);
err_irq:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-
- if (ehci->has_amcc_usb23)
- iounmap(ehci->ohci_hcctrl_reg);
err_rmr:
usb_put_hcd(hcd);
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index 99bde5fc..93c4923 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -90,6 +90,7 @@ static struct usb_device_id id_table [] = {
{ USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
{ USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
{ USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
+ { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
{ USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
{ USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
@@ -111,6 +112,7 @@ static struct usb_device_id id_table [] = {
{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
+ { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
@@ -124,14 +126,14 @@ static struct usb_device_id id_table [] = {
{ USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
- { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
- { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
- { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
- { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
{ USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
{ USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
{ USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
+ { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
+ { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
+ { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
+ { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
{ } /* Terminating Entry */
};
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 813ec3d..a7044b1 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -759,6 +759,14 @@ static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(FTDI_VID, SEGWAY_RMP200_PID) },
{ USB_DEVICE(IONICS_VID, IONICS_PLUGCOMPUTER_PID),
.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_24_MASTER_WING_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_PC_WING_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_USB_DMX_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_MIDI_TIMECODE_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_MINI_WING_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_MAXI_WING_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_MEDIA_WING_PID) },
+ { USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_WING_PID) },
{ }, /* Optional parameter entry */
{ } /* Terminating entry */
};
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index 52c3b68..30d3011 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -135,6 +135,18 @@
#define FTDI_NDI_AURORA_SCU_PID 0xDA74 /* NDI Aurora SCU */
/*
+ * ChamSys Limited (www.chamsys.co.uk) USB wing/interface product IDs
+ */
+#define FTDI_CHAMSYS_24_MASTER_WING_PID 0xDAF8
+#define FTDI_CHAMSYS_PC_WING_PID 0xDAF9
+#define FTDI_CHAMSYS_USB_DMX_PID 0xDAFA
+#define FTDI_CHAMSYS_MIDI_TIMECODE_PID 0xDAFB
+#define FTDI_CHAMSYS_MINI_WING_PID 0xDAFC
+#define FTDI_CHAMSYS_MAXI_WING_PID 0xDAFD
+#define FTDI_CHAMSYS_MEDIA_WING_PID 0xDAFE
+#define FTDI_CHAMSYS_WING_PID 0xDAFF
+
+/*
* Westrex International devices submitted by Cory Lee
*/
#define FTDI_WESTREX_MODEL_777_PID 0xDC00 /* Model 777 */
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index a861cd2..cf79fb2 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -120,15 +120,20 @@
* by making a change here, in moschip_port_id_table, and in
* moschip_id_table_combined
*/
-#define USB_VENDOR_ID_BANDB 0x0856
-#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
-#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
-#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
-#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
-#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
-#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
-#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
-#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
+#define USB_VENDOR_ID_BANDB 0x0856
+#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
+#define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
+#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
+#define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
+#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
+#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
+#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
+#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
+#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
+#define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
+#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
+#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
+#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
/* This driver also supports
* ATEN UC2324 device using Moschip MCS7840
@@ -184,13 +189,18 @@ static struct usb_device_id moschip_port_id_table[] = {
{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
{} /* terminating entry */
@@ -200,13 +210,18 @@ static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
+ {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
{} /* terminating entry */
@@ -280,12 +295,19 @@ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
{
struct usb_device *dev = port->serial->dev;
int ret = 0;
+ u8 *buf;
+
+ buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
- MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
+ MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
MOS_WDR_TIMEOUT);
+ *val = buf[0];
dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
- *val = (*val) & 0x00ff;
+
+ kfree(buf);
return ret;
}
@@ -338,6 +360,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
struct usb_device *dev = port->serial->dev;
int ret = 0;
__u16 Wval;
+ u8 *buf;
+
+ buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
/* dbg("application number is %4x",
(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
@@ -361,9 +388,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
}
}
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
- MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
+ MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
MOS_WDR_TIMEOUT);
- *val = (*val) & 0x00ff;
+ *val = buf[0];
+
+ kfree(buf);
return ret;
}
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 30e0467..a4dc7bf 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -106,6 +106,7 @@ static inline unsigned long *cpu_evtchn_mask(int cpu)
#define VALID_EVTCHN(chn) ((chn) != 0)
static struct irq_chip xen_dynamic_chip;
+static struct irq_chip xen_percpu_chip;
/* Constructor for packed IRQ information. */
static struct irq_info mk_unbound_info(void)
@@ -362,7 +363,7 @@ int bind_evtchn_to_irq(unsigned int evtchn)
irq = find_unbound_irq();
set_irq_chip_and_handler_name(irq, &xen_dynamic_chip,
- handle_level_irq, "event");
+ handle_edge_irq, "event");
evtchn_to_irq[evtchn] = irq;
irq_info[irq] = mk_evtchn_info(evtchn);
@@ -388,8 +389,8 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
if (irq < 0)
goto out;
- set_irq_chip_and_handler_name(irq, &xen_dynamic_chip,
- handle_level_irq, "ipi");
+ set_irq_chip_and_handler_name(irq, &xen_percpu_chip,
+ handle_percpu_irq, "ipi");
bind_ipi.vcpu = cpu;
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
@@ -429,8 +430,8 @@ static int bind_virq_to_irq(unsigned int virq, unsigned int cpu)
irq = find_unbound_irq();
- set_irq_chip_and_handler_name(irq, &xen_dynamic_chip,
- handle_level_irq, "virq");
+ set_irq_chip_and_handler_name(irq, &xen_percpu_chip,
+ handle_percpu_irq, "virq");
evtchn_to_irq[evtchn] = irq;
irq_info[irq] = mk_virq_info(evtchn, virq);
@@ -929,6 +930,16 @@ static struct irq_chip xen_dynamic_chip __read_mostly = {
.retrigger = retrigger_dynirq,
};
+static struct irq_chip en_percpu_chip __read_mostly = {
+ .name = "xen-percpu",
+
+ .disable = disable_dynirq,
+ .mask = disable_dynirq,
+ .unmask = enable_dynirq,
+
+ .ack = ack_dynirq,
+};
+
void __init xen_init_IRQ(void)
{
int i;
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c4e8353..42b60b0 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -723,7 +723,7 @@ static int __init init_misc_binfmt(void)
{
int err = register_filesystem(&bm_fs_type);
if (!err) {
- err = register_binfmt(&misc_format);
+ err = insert_binfmt(&misc_format);
if (err)
unregister_filesystem(&bm_fs_type);
}
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 51d9e33..650546f 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1158,6 +1158,14 @@ __acquires(&fc->lock)
}
}
+static void end_queued_requests(struct fuse_conn *fc)
+{
+ fc->max_background = UINT_MAX;
+ flush_bg_queue(fc);
+ end_requests(fc, &fc->pending);
+ end_requests(fc, &fc->processing);
+}
+
/*
* Abort all requests.
*
@@ -1184,8 +1192,7 @@ void fuse_abort_conn(struct fuse_conn *fc)
fc->connected = 0;
fc->blocked = 0;
end_io_requests(fc);
- end_requests(fc, &fc->pending);
- end_requests(fc, &fc->processing);
+ end_queued_requests(fc);
wake_up_all(&fc->waitq);
wake_up_all(&fc->blocked_waitq);
kill_fasync(&fc->fasync, SIGIO, POLL_IN);
@@ -1200,8 +1207,9 @@ int fuse_dev_release(struct inode *inode, struct file *file)
if (fc) {
spin_lock(&fc->lock);
fc->connected = 0;
- end_requests(fc, &fc->pending);
- end_requests(fc, &fc->processing);
+ fc->blocked = 0;
+ end_queued_requests(fc);
+ wake_up_all(&fc->blocked_waitq);
spin_unlock(&fc->lock);
fuse_conn_put(fc);
}
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 127ed5c..19cbbf7 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -273,7 +273,7 @@ static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
sin1->sin6_scope_id != sin2->sin6_scope_id)
return 0;
- return ipv6_addr_equal(&sin1->sin6_addr, &sin1->sin6_addr);
+ return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr);
}
#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 4c827d8..3fcb479 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -485,7 +485,11 @@ static int ocfs2_read_locked_inode(struct inode *inode,
OCFS2_BH_IGNORE_CACHE);
} else {
status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
- if (!status)
+ /*
+ * If buffer is in jbd, then its checksum may not have been
+ * computed as yet.
+ */
+ if (!status && !buffer_jbd(bh))
status = ocfs2_validate_inode_block(osb->sb, bh);
}
if (status < 0) {
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index f5ea468..7118a38 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -340,7 +340,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
char *p;
p = d_path(&file->f_path, last_sysfs_file, sizeof(last_sysfs_file));
- if (p)
+ if (!IS_ERR(p))
memmove(last_sysfs_file, p, strlen(p) + 1);
/* need attr_sd for attr and ops, its parent for kobj */
diff --git a/include/linux/compat.h b/include/linux/compat.h
index af931ee..cab23f2 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -309,5 +309,7 @@ asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user * filename,
asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename,
int flags, int mode);
+extern void __user *compat_alloc_user_space(unsigned long len);
+
#endif /* CONFIG_COMPAT */
#endif /* _LINUX_COMPAT_H */
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index a5740fc..a73454a 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -21,8 +21,7 @@ extern int number_of_cpusets; /* How many cpusets are defined in system? */
extern int cpuset_init(void);
extern void cpuset_init_smp(void);
extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
-extern void cpuset_cpus_allowed_locked(struct task_struct *p,
- struct cpumask *mask);
+extern int cpuset_cpus_allowed_fallback(struct task_struct *p);
extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
#define cpuset_current_mems_allowed (current->mems_allowed)
void cpuset_init_current_mems_allowed(void);
@@ -69,9 +68,6 @@ struct seq_file;
extern void cpuset_task_status_allowed(struct seq_file *m,
struct task_struct *task);
-extern void cpuset_lock(void);
-extern void cpuset_unlock(void);
-
extern int cpuset_mem_spread_node(void);
static inline int cpuset_do_page_mem_spread(void)
@@ -105,10 +101,11 @@ static inline void cpuset_cpus_allowed(struct task_struct *p,
{
cpumask_copy(mask, cpu_possible_mask);
}
-static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
- struct cpumask *mask)
+
+static inline int cpuset_cpus_allowed_fallback(struct task_struct *p)
{
- cpumask_copy(mask, cpu_possible_mask);
+ cpumask_copy(&p->cpus_allowed, cpu_possible_mask);
+ return cpumask_any(cpu_active_mask);
}
static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
@@ -157,9 +154,6 @@ static inline void cpuset_task_status_allowed(struct seq_file *m,
{
}
-static inline void cpuset_lock(void) {}
-static inline void cpuset_unlock(void) {}
-
static inline int cpuset_mem_spread_node(void)
{
return 0;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b0f6d97..a069916 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -339,6 +339,7 @@ enum {
ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
ATA_EHI_QUIET = (1 << 3), /* be quiet */
+ ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 6991ab5..91b05c1 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -14,8 +14,10 @@ struct irq_desc;
extern void mask_msi_irq(unsigned int irq);
extern void unmask_msi_irq(unsigned int irq);
extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
+extern void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
+extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
struct msi_desc {
diff --git a/include/linux/sched.h b/include/linux/sched.h
index cc24beb..957a25f 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -145,7 +145,6 @@ extern unsigned long this_cpu_load(void);
extern void calc_global_load(void);
-extern u64 cpu_nr_migrations(int cpu);
extern unsigned long get_parent_ip(unsigned long addr);
@@ -1001,6 +1000,7 @@ struct sched_domain {
char *name;
#endif
+ unsigned int span_weight;
/*
* Span of all CPUs in this domain.
*
@@ -1072,7 +1072,8 @@ struct sched_domain;
struct sched_class {
const struct sched_class *next;
- void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup);
+ void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup,
+ bool head);
void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep);
void (*yield_task) (struct rq *rq);
@@ -1082,7 +1083,8 @@ struct sched_class {
void (*put_prev_task) (struct rq *rq, struct task_struct *p);
#ifdef CONFIG_SMP
- int (*select_task_rq)(struct task_struct *p, int sd_flag, int flags);
+ int (*select_task_rq)(struct rq *rq, struct task_struct *p,
+ int sd_flag, int flags);
unsigned long (*load_balance) (struct rq *this_rq, int this_cpu,
struct rq *busiest, unsigned long max_load_move,
@@ -1094,7 +1096,8 @@ struct sched_class {
enum cpu_idle_type idle);
void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);
void (*post_schedule) (struct rq *this_rq);
- void (*task_wake_up) (struct rq *this_rq, struct task_struct *task);
+ void (*task_waking) (struct rq *this_rq, struct task_struct *task);
+ void (*task_woken) (struct rq *this_rq, struct task_struct *task);
void (*set_cpus_allowed)(struct task_struct *p,
const struct cpumask *newmask);
@@ -1105,7 +1108,7 @@ struct sched_class {
void (*set_curr_task) (struct rq *rq);
void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);
- void (*task_new) (struct rq *rq, struct task_struct *p);
+ void (*task_fork) (struct task_struct *p);
void (*switched_from) (struct rq *this_rq, struct task_struct *task,
int running);
@@ -1114,10 +1117,11 @@ struct sched_class {
void (*prio_changed) (struct rq *this_rq, struct task_struct *task,
int oldprio, int running);
- unsigned int (*get_rr_interval) (struct task_struct *task);
+ unsigned int (*get_rr_interval) (struct rq *rq,
+ struct task_struct *task);
#ifdef CONFIG_FAIR_GROUP_SCHED
- void (*moved_group) (struct task_struct *p);
+ void (*moved_group) (struct task_struct *p, int on_rq);
#endif
};
@@ -1178,7 +1182,6 @@ struct sched_entity {
u64 nr_failed_migrations_running;
u64 nr_failed_migrations_hot;
u64 nr_forced_migrations;
- u64 nr_forced2_migrations;
u64 nr_wakeups;
u64 nr_wakeups_sync;
@@ -1886,6 +1889,7 @@ extern void sched_clock_idle_sleep_event(void);
extern void sched_clock_idle_wakeup_event(u64 delta_ns);
#ifdef CONFIG_HOTPLUG_CPU
+extern void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p);
extern void idle_task_exit(void);
#else
static inline void idle_task_exit(void) {}
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 57e6357..5b81156 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -99,7 +99,7 @@ int arch_update_cpu_topology(void);
| 1*SD_WAKE_AFFINE \
| 1*SD_SHARE_CPUPOWER \
| 0*SD_POWERSAVINGS_BALANCE \
- | 0*SD_SHARE_PKG_RESOURCES \
+ | 1*SD_SHARE_PKG_RESOURCES \
| 0*SD_SERIALIZE \
| 0*SD_PREFER_SIBLING \
, \
diff --git a/kernel/compat.c b/kernel/compat.c
index 180d188..8bc5578 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -25,6 +25,7 @@
#include <linux/posix-timers.h>
#include <linux/times.h>
#include <linux/ptrace.h>
+#include <linux/module.h>
#include <asm/uaccess.h>
@@ -1136,3 +1137,24 @@ compat_sys_sysinfo(struct compat_sysinfo __user *info)
return 0;
}
+
+/*
+ * Allocate user-space memory for the duration of a single system call,
+ * in order to marshall parameters inside a compat thunk.
+ */
+void __user *compat_alloc_user_space(unsigned long len)
+{
+ void __user *ptr;
+
+ /* If len would occupy more than half of the entire compat space... */
+ if (unlikely(len > (((compat_uptr_t)~0) >> 1)))
+ return NULL;
+
+ ptr = arch_compat_alloc_user_space(len);
+
+ if (unlikely(!access_ok(VERIFY_WRITE, ptr, len)))
+ return NULL;
+
+ return ptr;
+}
+EXPORT_SYMBOL_GPL(compat_alloc_user_space);
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 291ac58..7e8b6ac 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -151,7 +151,7 @@ static inline void check_for_tasks(int cpu)
write_lock_irq(&tasklist_lock);
for_each_process(p) {
- if (task_cpu(p) == cpu &&
+ if (task_cpu(p) == cpu && p->state == TASK_RUNNING &&
(!cputime_eq(p->utime, cputime_zero) ||
!cputime_eq(p->stime, cputime_zero)))
printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d\
@@ -163,6 +163,7 @@ static inline void check_for_tasks(int cpu)
}
struct take_cpu_down_param {
+ struct task_struct *caller;
unsigned long mod;
void *hcpu;
};
@@ -171,6 +172,7 @@ struct take_cpu_down_param {
static int __ref take_cpu_down(void *_param)
{
struct take_cpu_down_param *param = _param;
+ unsigned int cpu = (unsigned long)param->hcpu;
int err;
/* Ensure this CPU doesn't handle any more interrupts. */
@@ -181,6 +183,8 @@ static int __ref take_cpu_down(void *_param)
raw_notifier_call_chain(&cpu_chain, CPU_DYING | param->mod,
param->hcpu);
+ if (task_cpu(param->caller) == cpu)
+ move_task_off_dead_cpu(cpu, param->caller);
/* Force idle task to run as soon as we yield: it should
immediately notice cpu is offline and die quickly. */
sched_idle_next();
@@ -191,10 +195,10 @@ static int __ref take_cpu_down(void *_param)
static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
{
int err, nr_calls = 0;
- cpumask_var_t old_allowed;
void *hcpu = (void *)(long)cpu;
unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
struct take_cpu_down_param tcd_param = {
+ .caller = current,
.mod = mod,
.hcpu = hcpu,
};
@@ -205,10 +209,8 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
if (!cpu_online(cpu))
return -EINVAL;
- if (!alloc_cpumask_var(&old_allowed, GFP_KERNEL))
- return -ENOMEM;
-
cpu_hotplug_begin();
+ set_cpu_active(cpu, false);
err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
hcpu, -1, &nr_calls);
if (err == NOTIFY_BAD) {
@@ -223,10 +225,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
goto out_release;
}
- /* Ensure that we are not runnable on dying cpu */
- cpumask_copy(old_allowed, ¤t->cpus_allowed);
- set_cpus_allowed_ptr(current, cpu_active_mask);
-
err = __stop_machine(take_cpu_down, &tcd_param, cpumask_of(cpu));
if (err) {
set_cpu_active(cpu, true);
@@ -235,7 +233,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
hcpu) == NOTIFY_BAD)
BUG();
- goto out_allowed;
+ goto out_release;
}
BUG_ON(cpu_online(cpu));
@@ -253,8 +251,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
check_for_tasks(cpu);
-out_allowed:
- set_cpus_allowed_ptr(current, old_allowed);
out_release:
cpu_hotplug_done();
if (!err) {
@@ -262,7 +258,6 @@ out_release:
hcpu) == NOTIFY_BAD)
BUG();
}
- free_cpumask_var(old_allowed);
return err;
}
@@ -280,18 +275,6 @@ int __ref cpu_down(unsigned int cpu)
goto out;
}
- set_cpu_active(cpu, false);
-
- /*
- * Make sure the all cpus did the reschedule and are not
- * using stale version of the cpu_active_mask.
- * This is not strictly necessary becuase stop_machine()
- * that we run down the line already provides the required
- * synchronization. But it's really a side effect and we do not
- * want to depend on the innards of the stop_machine here.
- */
- synchronize_sched();
-
err = _cpu_down(cpu, 0);
out:
@@ -382,19 +365,12 @@ int disable_nonboot_cpus(void)
return error;
cpu_maps_update_begin();
first_cpu = cpumask_first(cpu_online_mask);
- /* We take down all of the non-boot CPUs in one shot to avoid races
+ /*
+ * We take down all of the non-boot CPUs in one shot to avoid races
* with the userspace trying to use the CPU hotplug at the same time
*/
cpumask_clear(frozen_cpus);
- for_each_online_cpu(cpu) {
- if (cpu == first_cpu)
- continue;
- set_cpu_active(cpu, false);
- }
-
- synchronize_sched();
-
printk("Disabling non-boot CPUs ...\n");
for_each_online_cpu(cpu) {
if (cpu == first_cpu)
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index a81a910..b120fd0 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2145,19 +2145,52 @@ void __init cpuset_init_smp(void)
void cpuset_cpus_allowed(struct task_struct *tsk, struct cpumask *pmask)
{
mutex_lock(&callback_mutex);
- cpuset_cpus_allowed_locked(tsk, pmask);
+ task_lock(tsk);
+ guarantee_online_cpus(task_cs(tsk), pmask);
+ task_unlock(tsk);
mutex_unlock(&callback_mutex);
}
-/**
- * cpuset_cpus_allowed_locked - return cpus_allowed mask from a tasks cpuset.
- * Must be called with callback_mutex held.
- **/
-void cpuset_cpus_allowed_locked(struct task_struct *tsk, struct cpumask *pmask)
+int cpuset_cpus_allowed_fallback(struct task_struct *tsk)
{
- task_lock(tsk);
- guarantee_online_cpus(task_cs(tsk), pmask);
- task_unlock(tsk);
+ const struct cpuset *cs;
+ int cpu;
+
+ rcu_read_lock();
+ cs = task_cs(tsk);
+ if (cs)
+ cpumask_copy(&tsk->cpus_allowed, cs->cpus_allowed);
+ rcu_read_unlock();
+
+ /*
+ * We own tsk->cpus_allowed, nobody can change it under us.
+ *
+ * But we used cs && cs->cpus_allowed lockless and thus can
+ * race with cgroup_attach_task() or update_cpumask() and get
+ * the wrong tsk->cpus_allowed. However, both cases imply the
+ * subsequent cpuset_change_cpumask()->set_cpus_allowed_ptr()
+ * which takes task_rq_lock().
+ *
+ * If we are called after it dropped the lock we must see all
+ * changes in tsk_cs()->cpus_allowed. Otherwise we can temporary
+ * set any mask even if it is not right from task_cs() pov,
+ * the pending set_cpus_allowed_ptr() will fix things.
+ */
+
+ cpu = cpumask_any_and(&tsk->cpus_allowed, cpu_active_mask);
+ if (cpu >= nr_cpu_ids) {
+ /*
+ * Either tsk->cpus_allowed is wrong (see above) or it
+ * is actually empty. The latter case is only possible
+ * if we are racing with remove_tasks_in_empty_cpuset().
+ * Like above we can temporary set any mask and rely on
+ * set_cpus_allowed_ptr() as synchronization point.
+ */
+ cpumask_copy(&tsk->cpus_allowed, cpu_possible_mask);
+ cpu = cpumask_any(cpu_active_mask);
+ }
+
+ return cpu;
}
void cpuset_init_current_mems_allowed(void)
@@ -2346,22 +2379,6 @@ int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
}
/**
- * cpuset_lock - lock out any changes to cpuset structures
- *
- * The out of memory (oom) code needs to mutex_lock cpusets
- * from being changed while it scans the tasklist looking for a
- * task in an overlapping cpuset. Expose callback_mutex via this
- * cpuset_lock() routine, so the oom code can lock it, before
- * locking the task list. The tasklist_lock is a spinlock, so
- * must be taken inside callback_mutex.
- */
-
-void cpuset_lock(void)
-{
- mutex_lock(&callback_mutex);
-}
-
-/**
* cpuset_unlock - release lock on cpuset changes
*
* Undo the lock taken in a previous cpuset_lock() call.
diff --git a/kernel/fork.c b/kernel/fork.c
index 9f3b066..4bde56f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1233,21 +1233,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
/* Need tasklist lock for parent etc handling! */
write_lock_irq(&tasklist_lock);
- /*
- * The task hasn't been attached yet, so its cpus_allowed mask will
- * not be changed, nor will its assigned CPU.
- *
- * The cpus_allowed mask of the parent may have changed after it was
- * copied first time - so re-copy it here, then check the child's CPU
- * to ensure it is on a valid CPU (and if not, just force it back to
- * parent's CPU). This avoids alot of nasty races.
- */
- p->cpus_allowed = current->cpus_allowed;
- p->rt.nr_cpus_allowed = current->rt.nr_cpus_allowed;
- if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed) ||
- !cpu_online(task_cpu(p))))
- set_task_cpu(p, smp_processor_id());
-
/* CLONE_PARENT re-uses the old parent */
if (clone_flags & (CLONE_PARENT|CLONE_THREAD)) {
p->real_parent = current->real_parent;
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c
index ef3c3f8..f83972b 100644
--- a/kernel/gcov/fs.c
+++ b/kernel/gcov/fs.c
@@ -33,10 +33,11 @@
* @children: child nodes
* @all: list head for list of all nodes
* @parent: parent node
- * @info: associated profiling data structure if not a directory
- * @ghost: when an object file containing profiling data is unloaded we keep a
- * copy of the profiling data here to allow collecting coverage data
- * for cleanup code. Such a node is called a "ghost".
+ * @loaded_info: array of pointers to profiling data sets for loaded object
+ * files.
+ * @num_loaded: number of profiling data sets for loaded object files.
+ * @unloaded_info: accumulated copy of profiling data sets for unloaded
+ * object files. Used only when gcov_persist=1.
* @dentry: main debugfs entry, either a directory or data file
* @links: associated symbolic links
* @name: data file basename
@@ -51,10 +52,11 @@ struct gcov_node {
struct list_head children;
struct list_head all;
struct gcov_node *parent;
- struct gcov_info *info;
- struct gcov_info *ghost;
+ struct gcov_info **loaded_info;
+ struct gcov_info *unloaded_info;
struct dentry *dentry;
struct dentry **links;
+ int num_loaded;
char name[0];
};
@@ -136,16 +138,37 @@ static const struct seq_operations gcov_seq_ops = {
};
/*
- * Return the profiling data set for a given node. This can either be the
- * original profiling data structure or a duplicate (also called "ghost")
- * in case the associated object file has been unloaded.
+ * Return a profiling data set associated with the given node. This is
+ * either a data set for a loaded object file or a data set copy in case
+ * all associated object files have been unloaded.
*/
static struct gcov_info *get_node_info(struct gcov_node *node)
{
- if (node->info)
- return node->info;
+ if (node->num_loaded > 0)
+ return node->loaded_info[0];
- return node->ghost;
+ return node->unloaded_info;
+}
+
+/*
+ * Return a newly allocated profiling data set which contains the sum of
+ * all profiling data associated with the given node.
+ */
+static struct gcov_info *get_accumulated_info(struct gcov_node *node)
+{
+ struct gcov_info *info;
+ int i = 0;
+
+ if (node->unloaded_info)
+ info = gcov_info_dup(node->unloaded_info);
+ else
+ info = gcov_info_dup(node->loaded_info[i++]);
+ if (!info)
+ return NULL;
+ for (; i < node->num_loaded; i++)
+ gcov_info_add(info, node->loaded_info[i]);
+
+ return info;
}
/*
@@ -163,9 +186,10 @@ static int gcov_seq_open(struct inode *inode, struct file *file)
mutex_lock(&node_lock);
/*
* Read from a profiling data copy to minimize reference tracking
- * complexity and concurrent access.
+ * complexity and concurrent access and to keep accumulating multiple
+ * profiling data sets associated with one node simple.
*/
- info = gcov_info_dup(get_node_info(node));
+ info = get_accumulated_info(node);
if (!info)
goto out_unlock;
iter = gcov_iter_new(info);
@@ -225,12 +249,25 @@ static struct gcov_node *get_node_by_name(const char *name)
return NULL;
}
+/*
+ * Reset all profiling data associated with the specified node.
+ */
+static void reset_node(struct gcov_node *node)
+{
+ int i;
+
+ if (node->unloaded_info)
+ gcov_info_reset(node->unloaded_info);
+ for (i = 0; i < node->num_loaded; i++)
+ gcov_info_reset(node->loaded_info[i]);
+}
+
static void remove_node(struct gcov_node *node);
/*
* write() implementation for gcov data files. Reset profiling data for the
- * associated file. If the object file has been unloaded (i.e. this is
- * a "ghost" node), remove the debug fs node as well.
+ * corresponding file. If all associated object files have been unloaded,
+ * remove the debug fs node as well.
*/
static ssize_t gcov_seq_write(struct file *file, const char __user *addr,
size_t len, loff_t *pos)
@@ -245,10 +282,10 @@ static ssize_t gcov_seq_write(struct file *file, const char __user *addr,
node = get_node_by_name(info->filename);
if (node) {
/* Reset counts or remove node for unloaded modules. */
- if (node->ghost)
+ if (node->num_loaded == 0)
remove_node(node);
else
- gcov_info_reset(node->info);
+ reset_node(node);
}
/* Reset counts for open file. */
gcov_info_reset(info);
@@ -378,7 +415,10 @@ static void init_node(struct gcov_node *node, struct gcov_info *info,
INIT_LIST_HEAD(&node->list);
INIT_LIST_HEAD(&node->children);
INIT_LIST_HEAD(&node->all);
- node->info = info;
+ if (node->loaded_info) {
+ node->loaded_info[0] = info;
+ node->num_loaded = 1;
+ }
node->parent = parent;
if (name)
strcpy(node->name, name);
@@ -394,9 +434,13 @@ static struct gcov_node *new_node(struct gcov_node *parent,
struct gcov_node *node;
node = kzalloc(sizeof(struct gcov_node) + strlen(name) + 1, GFP_KERNEL);
- if (!node) {
- pr_warning("out of memory\n");
- return NULL;
+ if (!node)
+ goto err_nomem;
+ if (info) {
+ node->loaded_info = kcalloc(1, sizeof(struct gcov_info *),
+ GFP_KERNEL);
+ if (!node->loaded_info)
+ goto err_nomem;
}
init_node(node, info, name, parent);
/* Differentiate between gcov data file nodes and directory nodes. */
@@ -416,6 +460,11 @@ static struct gcov_node *new_node(struct gcov_node *parent,
list_add(&node->all, &all_head);
return node;
+
+err_nomem:
+ kfree(node);
+ pr_warning("out of memory\n");
+ return NULL;
}
/* Remove symbolic links associated with node. */
@@ -441,8 +490,9 @@ static void release_node(struct gcov_node *node)
list_del(&node->all);
debugfs_remove(node->dentry);
remove_links(node);
- if (node->ghost)
- gcov_info_free(node->ghost);
+ kfree(node->loaded_info);
+ if (node->unloaded_info)
+ gcov_info_free(node->unloaded_info);
kfree(node);
}
@@ -477,7 +527,7 @@ static struct gcov_node *get_child_by_name(struct gcov_node *parent,
/*
* write() implementation for reset file. Reset all profiling data to zero
- * and remove ghost nodes.
+ * and remove nodes for which all associated object files are unloaded.
*/
static ssize_t reset_write(struct file *file, const char __user *addr,
size_t len, loff_t *pos)
@@ -487,8 +537,8 @@ static ssize_t reset_write(struct file *file, const char __user *addr,
mutex_lock(&node_lock);
restart:
list_for_each_entry(node, &all_head, all) {
- if (node->info)
- gcov_info_reset(node->info);
+ if (node->num_loaded > 0)
+ reset_node(node);
else if (list_empty(&node->children)) {
remove_node(node);
/* Several nodes may have gone - restart loop. */
@@ -564,37 +614,115 @@ err_remove:
}
/*
- * The profiling data set associated with this node is being unloaded. Store a
- * copy of the profiling data and turn this node into a "ghost".
+ * Associate a profiling data set with an existing node. Needs to be called
+ * with node_lock held.
*/
-static int ghost_node(struct gcov_node *node)
+static void add_info(struct gcov_node *node, struct gcov_info *info)
{
- node->ghost = gcov_info_dup(node->info);
- if (!node->ghost) {
- pr_warning("could not save data for '%s' (out of memory)\n",
- node->info->filename);
- return -ENOMEM;
+ struct gcov_info **loaded_info;
+ int num = node->num_loaded;
+
+ /*
+ * Prepare new array. This is done first to simplify cleanup in
+ * case the new data set is incompatible, the node only contains
+ * unloaded data sets and there's not enough memory for the array.
+ */
+ loaded_info = kcalloc(num + 1, sizeof(struct gcov_info *), GFP_KERNEL);
+ if (!loaded_info) {
+ pr_warning("could not add '%s' (out of memory)\n",
+ info->filename);
+ return;
+ }
+ memcpy(loaded_info, node->loaded_info,
+ num * sizeof(struct gcov_info *));
+ loaded_info[num] = info;
+ /* Check if the new data set is compatible. */
+ if (num == 0) {
+ /*
+ * A module was unloaded, modified and reloaded. The new
+ * data set replaces the copy of the last one.
+ */
+ if (!gcov_info_is_compatible(node->unloaded_info, info)) {
+ pr_warning("discarding saved data for %s "
+ "(incompatible version)\n", info->filename);
+ gcov_info_free(node->unloaded_info);
+ node->unloaded_info = NULL;
+ }
+ } else {
+ /*
+ * Two different versions of the same object file are loaded.
+ * The initial one takes precedence.
+ */
+ if (!gcov_info_is_compatible(node->loaded_info[0], info)) {
+ pr_warning("could not add '%s' (incompatible "
+ "version)\n", info->filename);
+ kfree(loaded_info);
+ return;
+ }
}
- node->info = NULL;
+ /* Overwrite previous array. */
+ kfree(node->loaded_info);
+ node->loaded_info = loaded_info;
+ node->num_loaded = num + 1;
+}
- return 0;
+/*
+ * Return the index of a profiling data set associated with a node.
+ */
+static int get_info_index(struct gcov_node *node, struct gcov_info *info)
+{
+ int i;
+
+ for (i = 0; i < node->num_loaded; i++) {
+ if (node->loaded_info[i] == info)
+ return i;
+ }
+ return -ENOENT;
}
/*
- * Profiling data for this node has been loaded again. Add profiling data
- * from previous instantiation and turn this node into a regular node.
+ * Save the data of a profiling data set which is being unloaded.
*/
-static void revive_node(struct gcov_node *node, struct gcov_info *info)
+static void save_info(struct gcov_node *node, struct gcov_info *info)
{
- if (gcov_info_is_compatible(node->ghost, info))
- gcov_info_add(info, node->ghost);
+ if (node->unloaded_info)
+ gcov_info_add(node->unloaded_info, info);
else {
- pr_warning("discarding saved data for '%s' (version changed)\n",
+ node->unloaded_info = gcov_info_dup(info);
+ if (!node->unloaded_info) {
+ pr_warning("could not save data for '%s' "
+ "(out of memory)\n", info->filename);
+ }
+ }
+}
+
+/*
+ * Disassociate a profiling data set from a node. Needs to be called with
+ * node_lock held.
+ */
+static void remove_info(struct gcov_node *node, struct gcov_info *info)
+{
+ int i;
+
+ i = get_info_index(node, info);
+ if (i < 0) {
+ pr_warning("could not remove '%s' (not found)\n",
info->filename);
+ return;
}
- gcov_info_free(node->ghost);
- node->ghost = NULL;
- node->info = info;
+ if (gcov_persist)
+ save_info(node, info);
+ /* Shrink array. */
+ node->loaded_info[i] = node->loaded_info[node->num_loaded - 1];
+ node->num_loaded--;
+ if (node->num_loaded > 0)
+ return;
+ /* Last loaded data set was removed. */
+ kfree(node->loaded_info);
+ node->loaded_info = NULL;
+ node->num_loaded = 0;
+ if (!node->unloaded_info)
+ remove_node(node);
}
/*
@@ -609,30 +737,18 @@ void gcov_event(enum gcov_action action, struct gcov_info *info)
node = get_node_by_name(info->filename);
switch (action) {
case GCOV_ADD:
- /* Add new node or revive ghost. */
- if (!node) {
+ if (node)
+ add_info(node, info);
+ else
add_node(info);
- break;
- }
- if (gcov_persist)
- revive_node(node, info);
- else {
- pr_warning("could not add '%s' (already exists)\n",
- info->filename);
- }
break;
case GCOV_REMOVE:
- /* Remove node or turn into ghost. */
- if (!node) {
+ if (node)
+ remove_info(node, info);
+ else {
pr_warning("could not remove '%s' (not found)\n",
info->filename);
- break;
}
- if (gcov_persist) {
- if (!ghost_node(node))
- break;
- }
- remove_node(node);
break;
}
mutex_unlock(&node_lock);
diff --git a/kernel/groups.c b/kernel/groups.c
index 2b45b2e..f0c2528 100644
--- a/kernel/groups.c
+++ b/kernel/groups.c
@@ -143,10 +143,9 @@ int groups_search(const struct group_info *group_info, gid_t grp)
right = group_info->ngroups;
while (left < right) {
unsigned int mid = (left+right)/2;
- int cmp = grp - GROUP_AT(group_info, mid);
- if (cmp > 0)
+ if (grp > GROUP_AT(group_info, mid))
left = mid + 1;
- else if (cmp < 0)
+ else if (grp < GROUP_AT(group_info, mid))
right = mid;
else
return 1;
diff --git a/kernel/sched.c b/kernel/sched.c
index 9990074..152214d 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -542,7 +542,6 @@ struct rq {
struct load_weight load;
unsigned long nr_load_updates;
u64 nr_switches;
- u64 nr_migrations_in;
struct cfs_rq cfs;
struct rt_rq rt;
@@ -943,14 +942,25 @@ static inline void finish_lock_switch(struct rq *rq, struct task_struct *prev)
#endif /* __ARCH_WANT_UNLOCKED_CTXSW */
/*
+ * Check whether the task is waking, we use this to synchronize ->cpus_allowed
+ * against ttwu().
+ */
+static inline int task_is_waking(struct task_struct *p)
+{
+ return unlikely(p->state == TASK_WAKING);
+}
+
+/*
* __task_rq_lock - lock the runqueue a given task resides on.
* Must be called interrupts disabled.
*/
static inline struct rq *__task_rq_lock(struct task_struct *p)
__acquires(rq->lock)
{
+ struct rq *rq;
+
for (;;) {
- struct rq *rq = task_rq(p);
+ rq = task_rq(p);
spin_lock(&rq->lock);
if (likely(rq == task_rq(p)))
return rq;
@@ -1822,6 +1832,20 @@ static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
static void calc_load_account_active(struct rq *this_rq);
static void update_sysctl(void);
+static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu)
+{
+ set_task_rq(p, cpu);
+#ifdef CONFIG_SMP
+ /*
+ * After ->cpu is set up to a new value, task_rq_lock(p, ...) can be
+ * successfuly executed on another CPU. We must ensure that updates of
+ * per-task data have been completed by this moment.
+ */
+ smp_wmb();
+ task_thread_info(p)->cpu = cpu;
+#endif
+}
+
#include "sched_stats.h"
#include "sched_idletask.c"
#include "sched_fair.c"
@@ -1871,13 +1895,14 @@ static void update_avg(u64 *avg, u64 sample)
*avg += diff >> 3;
}
-static void enqueue_task(struct rq *rq, struct task_struct *p, int wakeup)
+static void
+enqueue_task(struct rq *rq, struct task_struct *p, int wakeup, bool head)
{
if (wakeup)
p->se.start_runtime = p->se.sum_exec_runtime;
sched_info_queued(p);
- p->sched_class->enqueue_task(rq, p, wakeup);
+ p->sched_class->enqueue_task(rq, p, wakeup, head);
p->se.on_rq = 1;
}
@@ -1953,7 +1978,7 @@ static void activate_task(struct rq *rq, struct task_struct *p, int wakeup)
if (task_contributes_to_load(p))
rq->nr_uninterruptible--;
- enqueue_task(rq, p, wakeup);
+ enqueue_task(rq, p, wakeup, false);
inc_nr_running(rq);
}
@@ -1978,20 +2003,6 @@ inline int task_curr(const struct task_struct *p)
return cpu_curr(task_cpu(p)) == p;
}
-static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu)
-{
- set_task_rq(p, cpu);
-#ifdef CONFIG_SMP
- /*
- * After ->cpu is set up to a new value, task_rq_lock(p, ...) can be
- * successfuly executed on another CPU. We must ensure that updates of
- * per-task data have been completed by this moment.
- */
- smp_wmb();
- task_thread_info(p)->cpu = cpu;
-#endif
-}
-
static inline void check_class_changed(struct rq *rq, struct task_struct *p,
const struct sched_class *prev_class,
int oldprio, int running)
@@ -2018,21 +2029,15 @@ static inline void check_class_changed(struct rq *rq, struct task_struct *p,
*/
void kthread_bind(struct task_struct *p, unsigned int cpu)
{
- struct rq *rq = cpu_rq(cpu);
- unsigned long flags;
-
/* Must have done schedule() in kthread() before we set_task_cpu */
if (!wait_task_inactive(p, TASK_UNINTERRUPTIBLE)) {
WARN_ON(1);
return;
}
- spin_lock_irqsave(&rq->lock, flags);
- set_task_cpu(p, cpu);
p->cpus_allowed = cpumask_of_cpu(cpu);
p->rt.nr_cpus_allowed = 1;
p->flags |= PF_THREAD_BOUND;
- spin_unlock_irqrestore(&rq->lock, flags);
}
EXPORT_SYMBOL(kthread_bind);
@@ -2070,35 +2075,23 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
{
int old_cpu = task_cpu(p);
- struct rq *old_rq = cpu_rq(old_cpu), *new_rq = cpu_rq(new_cpu);
- struct cfs_rq *old_cfsrq = task_cfs_rq(p),
- *new_cfsrq = cpu_cfs_rq(old_cfsrq, new_cpu);
- u64 clock_offset;
- clock_offset = old_rq->clock - new_rq->clock;
+#ifdef CONFIG_SCHED_DEBUG
+ /*
+ * We should never call set_task_cpu() on a blocked task,
+ * ttwu() will sort out the placement.
+ */
+ WARN_ON_ONCE(p->state != TASK_RUNNING && p->state != TASK_WAKING &&
+ !(task_thread_info(p)->preempt_count & PREEMPT_ACTIVE));
+#endif
trace_sched_migrate_task(p, new_cpu);
-#ifdef CONFIG_SCHEDSTATS
- if (p->se.wait_start)
- p->se.wait_start -= clock_offset;
- if (p->se.sleep_start)
- p->se.sleep_start -= clock_offset;
- if (p->se.block_start)
- p->se.block_start -= clock_offset;
-#endif
if (old_cpu != new_cpu) {
p->se.nr_migrations++;
- new_rq->nr_migrations_in++;
-#ifdef CONFIG_SCHEDSTATS
- if (task_hot(p, old_rq->clock, NULL))
- schedstat_inc(p, se.nr_forced2_migrations);
-#endif
perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS,
1, 1, NULL, 0);
}
- p->se.vruntime -= old_cfsrq->min_vruntime -
- new_cfsrq->min_vruntime;
__set_task_cpu(p, new_cpu);
}
@@ -2331,6 +2324,69 @@ void task_oncpu_function_call(struct task_struct *p,
preempt_enable();
}
+#ifdef CONFIG_SMP
+/*
+ * ->cpus_allowed is protected by either TASK_WAKING or rq->lock held.
+ */
+static int select_fallback_rq(int cpu, struct task_struct *p)
+{
+ int dest_cpu;
+ const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(cpu));
+
+ /* Look for allowed, online CPU in same node. */
+ for_each_cpu_and(dest_cpu, nodemask, cpu_active_mask)
+ if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
+ return dest_cpu;
+
+ /* Any allowed, online CPU? */
+ dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_active_mask);
+ if (dest_cpu < nr_cpu_ids)
+ return dest_cpu;
+
+ /* No more Mr. Nice Guy. */
+ if (unlikely(dest_cpu >= nr_cpu_ids)) {
+ dest_cpu = cpuset_cpus_allowed_fallback(p);
+ /*
+ * Don't tell them about moving exiting tasks or
+ * kernel threads (both mm NULL), since they never
+ * leave kernel.
+ */
+ if (p->mm && printk_ratelimit()) {
+ printk(KERN_INFO "process %d (%s) no "
+ "longer affine to cpu%d\n",
+ task_pid_nr(p), p->comm, cpu);
+ }
+ }
+
+ return dest_cpu;
+}
+
+/*
+ * The caller (fork, wakeup) owns TASK_WAKING, ->cpus_allowed is stable.
+ */
+static inline
+int select_task_rq(struct rq *rq, struct task_struct *p, int sd_flags, int wake_flags)
+{
+ int cpu = p->sched_class->select_task_rq(rq, p, sd_flags, wake_flags);
+
+ /*
+ * In order not to call set_task_cpu() on a blocking task we need
+ * to rely on ttwu() to place the task on a valid ->cpus_allowed
+ * cpu.
+ *
+ * Since this is common to all placement strategies, this lives here.
+ *
+ * [ this allows ->select_task() to simply return task_cpu(p) and
+ * not worry about this generic constraint ]
+ */
+ if (unlikely(!cpumask_test_cpu(cpu, &p->cpus_allowed) ||
+ !cpu_online(cpu)))
+ cpu = select_fallback_rq(task_cpu(p), p);
+
+ return cpu;
+}
+#endif
+
/***
* try_to_wake_up - wake up a thread
* @p: the to-be-woken-up thread
@@ -2379,22 +2435,34 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state,
*
* First fix up the nr_uninterruptible count:
*/
- if (task_contributes_to_load(p))
- rq->nr_uninterruptible--;
+ if (task_contributes_to_load(p)) {
+ if (likely(cpu_online(orig_cpu)))
+ rq->nr_uninterruptible--;
+ else
+ this_rq()->nr_uninterruptible--;
+ }
p->state = TASK_WAKING;
- task_rq_unlock(rq, &flags);
- cpu = p->sched_class->select_task_rq(p, SD_BALANCE_WAKE, wake_flags);
+ if (p->sched_class->task_waking)
+ p->sched_class->task_waking(rq, p);
+
+ cpu = select_task_rq(rq, p, SD_BALANCE_WAKE, wake_flags);
if (cpu != orig_cpu)
set_task_cpu(p, cpu);
+ __task_rq_unlock(rq);
- rq = task_rq_lock(p, &flags);
-
- if (rq != orig_rq)
- update_rq_clock(rq);
+ rq = cpu_rq(cpu);
+ spin_lock(&rq->lock);
+ update_rq_clock(rq);
+ /*
+ * We migrated the task without holding either rq->lock, however
+ * since the task is not on the task list itself, nobody else
+ * will try and migrate the task, hence the rq should match the
+ * cpu we just moved it to.
+ */
+ WARN_ON(task_cpu(p) != cpu);
WARN_ON(p->state != TASK_WAKING);
- cpu = task_cpu(p);
#ifdef CONFIG_SCHEDSTATS
schedstat_inc(rq, ttwu_count);
@@ -2447,8 +2515,8 @@ out_running:
p->state = TASK_RUNNING;
#ifdef CONFIG_SMP
- if (p->sched_class->task_wake_up)
- p->sched_class->task_wake_up(rq, p);
+ if (p->sched_class->task_woken)
+ p->sched_class->task_woken(rq, p);
if (unlikely(rq->idle_stamp)) {
u64 delta = rq->clock - rq->idle_stamp;
@@ -2528,7 +2596,6 @@ static void __sched_fork(struct task_struct *p)
p->se.nr_failed_migrations_running = 0;
p->se.nr_failed_migrations_hot = 0;
p->se.nr_forced_migrations = 0;
- p->se.nr_forced2_migrations = 0;
p->se.nr_wakeups = 0;
p->se.nr_wakeups_sync = 0;
@@ -2549,14 +2616,6 @@ static void __sched_fork(struct task_struct *p)
#ifdef CONFIG_PREEMPT_NOTIFIERS
INIT_HLIST_HEAD(&p->preempt_notifiers);
#endif
-
- /*
- * We mark the process as running here, but have not actually
- * inserted it onto the runqueue yet. This guarantees that
- * nobody will actually run it, and a signal or other external
- * event cannot wake it up and insert it on the runqueue either.
- */
- p->state = TASK_RUNNING;
}
/*
@@ -2567,6 +2626,12 @@ void sched_fork(struct task_struct *p, int clone_flags)
int cpu = get_cpu();
__sched_fork(p);
+ /*
+ * We mark the process as running here. This guarantees that
+ * nobody will actually run it, and a signal or other external
+ * event cannot wake it up and insert it on the runqueue either.
+ */
+ p->state = TASK_RUNNING;
/*
* Revert to default priority/policy on fork if requested.
@@ -2598,9 +2663,9 @@ void sched_fork(struct task_struct *p, int clone_flags)
if (!rt_prio(p->prio))
p->sched_class = &fair_sched_class;
-#ifdef CONFIG_SMP
- cpu = p->sched_class->select_task_rq(p, SD_BALANCE_FORK, 0);
-#endif
+ if (p->sched_class->task_fork)
+ p->sched_class->task_fork(p);
+
set_task_cpu(p, cpu);
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
@@ -2630,28 +2695,38 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
{
unsigned long flags;
struct rq *rq;
+ int cpu = get_cpu();
+#ifdef CONFIG_SMP
rq = task_rq_lock(p, &flags);
- BUG_ON(p->state != TASK_RUNNING);
- update_rq_clock(rq);
+ p->state = TASK_WAKING;
- if (!p->sched_class->task_new || !current->se.on_rq) {
- activate_task(rq, p, 0);
- } else {
- /*
- * Let the scheduling class do new task startup
- * management (if any):
- */
- p->sched_class->task_new(rq, p);
- inc_nr_running(rq);
- }
+ /*
+ * Fork balancing, do it here and not earlier because:
+ * - cpus_allowed can change in the fork path
+ * - any previously selected cpu might disappear through hotplug
+ *
+ * We set TASK_WAKING so that select_task_rq() can drop rq->lock
+ * without people poking at ->cpus_allowed.
+ */
+ cpu = select_task_rq(rq, p, SD_BALANCE_FORK, 0);
+ set_task_cpu(p, cpu);
+
+ p->state = TASK_RUNNING;
+ task_rq_unlock(rq, &flags);
+#endif
+
+ rq = task_rq_lock(p, &flags);
+ update_rq_clock(rq);
+ activate_task(rq, p, 0);
trace_sched_wakeup_new(rq, p, 1);
check_preempt_curr(rq, p, WF_FORK);
#ifdef CONFIG_SMP
- if (p->sched_class->task_wake_up)
- p->sched_class->task_wake_up(rq, p);
+ if (p->sched_class->task_woken)
+ p->sched_class->task_woken(rq, p);
#endif
task_rq_unlock(rq, &flags);
+ put_cpu();
}
#ifdef CONFIG_PREEMPT_NOTIFIERS
@@ -3038,15 +3113,6 @@ static void calc_load_account_active(struct rq *this_rq)
}
/*
- * Externally visible per-cpu scheduler statistics:
- * cpu_nr_migrations(cpu) - number of migrations into that cpu
- */
-u64 cpu_nr_migrations(int cpu)
-{
- return cpu_rq(cpu)->nr_migrations_in;
-}
-
-/*
* Update rq->cpu_load[] statistics. This function is usually called every
* scheduler tick (TICK_NSEC).
*/
@@ -3128,24 +3194,28 @@ static void double_rq_unlock(struct rq *rq1, struct rq *rq2)
}
/*
- * If dest_cpu is allowed for this process, migrate the task to it.
- * This is accomplished by forcing the cpu_allowed mask to only
- * allow dest_cpu, which will force the cpu onto dest_cpu. Then
- * the cpu_allowed mask is restored.
+ * sched_exec - execve() is a valuable balancing opportunity, because at
+ * this point the task has the smallest effective memory and cache footprint.
*/
-static void sched_migrate_task(struct task_struct *p, int dest_cpu)
+void sched_exec(void)
{
+ struct task_struct *p = current;
struct migration_req req;
unsigned long flags;
struct rq *rq;
+ int dest_cpu;
rq = task_rq_lock(p, &flags);
- if (!cpumask_test_cpu(dest_cpu, &p->cpus_allowed)
- || unlikely(!cpu_active(dest_cpu)))
- goto out;
+ dest_cpu = p->sched_class->select_task_rq(rq, p, SD_BALANCE_EXEC, 0);
+ if (dest_cpu == smp_processor_id())
+ goto unlock;
- /* force the process onto the specified CPU */
- if (migrate_task(p, dest_cpu, &req)) {
+ /*
+ * select_task_rq() can race against ->cpus_allowed
+ */
+ if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed) &&
+ likely(cpu_active(dest_cpu)) &&
+ migrate_task(p, dest_cpu, &req)) {
/* Need to wait for migration thread (might exit: take ref). */
struct task_struct *mt = rq->migration_thread;
@@ -3157,24 +3227,11 @@ static void sched_migrate_task(struct task_struct *p, int dest_cpu)
return;
}
-out:
+unlock:
task_rq_unlock(rq, &flags);
}
/*
- * sched_exec - execve() is a valuable balancing opportunity, because at
- * this point the task has the smallest effective memory and cache footprint.
- */
-void sched_exec(void)
-{
- int new_cpu, this_cpu = get_cpu();
- new_cpu = current->sched_class->select_task_rq(current, SD_BALANCE_EXEC, 0);
- put_cpu();
- if (new_cpu != this_cpu)
- sched_migrate_task(current, new_cpu);
-}
-
-/*
* pull_task - move a task from a remote runqueue to the local runqueue.
* Both runqueues must be locked.
*/
@@ -3621,7 +3678,7 @@ unsigned long __weak arch_scale_freq_power(struct sched_domain *sd, int cpu)
unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu)
{
- unsigned long weight = cpumask_weight(sched_domain_span(sd));
+ unsigned long weight = sd->span_weight;
unsigned long smt_gain = sd->smt_gain;
smt_gain /= weight;
@@ -3654,7 +3711,7 @@ unsigned long scale_rt_power(int cpu)
static void update_cpu_power(struct sched_domain *sd, int cpu)
{
- unsigned long weight = cpumask_weight(sched_domain_span(sd));
+ unsigned long weight = sd->span_weight;
unsigned long power = SCHED_LOAD_SCALE;
struct sched_group *sdg = sd->groups;
@@ -5974,14 +6031,15 @@ EXPORT_SYMBOL(wait_for_completion_killable);
*/
bool try_wait_for_completion(struct completion *x)
{
+ unsigned long flags;
int ret = 1;
- spin_lock_irq(&x->wait.lock);
+ spin_lock_irqsave(&x->wait.lock, flags);
if (!x->done)
ret = 0;
else
x->done--;
- spin_unlock_irq(&x->wait.lock);
+ spin_unlock_irqrestore(&x->wait.lock, flags);
return ret;
}
EXPORT_SYMBOL(try_wait_for_completion);
@@ -5996,12 +6054,13 @@ EXPORT_SYMBOL(try_wait_for_completion);
*/
bool completion_done(struct completion *x)
{
+ unsigned long flags;
int ret = 1;
- spin_lock_irq(&x->wait.lock);
+ spin_lock_irqsave(&x->wait.lock, flags);
if (!x->done)
ret = 0;
- spin_unlock_irq(&x->wait.lock);
+ spin_unlock_irqrestore(&x->wait.lock, flags);
return ret;
}
EXPORT_SYMBOL(completion_done);
@@ -6095,7 +6154,7 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
if (running)
p->sched_class->set_curr_task(rq);
if (on_rq) {
- enqueue_task(rq, p, 0);
+ enqueue_task(rq, p, 0, oldprio < prio);
check_class_changed(rq, p, prev_class, oldprio, running);
}
@@ -6139,7 +6198,7 @@ void set_user_nice(struct task_struct *p, long nice)
delta = p->prio - old_prio;
if (on_rq) {
- enqueue_task(rq, p, 0);
+ enqueue_task(rq, p, 0, false);
/*
* If the task increased its priority or is running and
* lowered its priority, then reschedule its CPU:
@@ -6530,7 +6589,7 @@ SYSCALL_DEFINE1(sched_getscheduler, pid_t, pid)
return -EINVAL;
retval = -ESRCH;
- read_lock(&tasklist_lock);
+ rcu_read_lock();
p = find_process_by_pid(pid);
if (p) {
retval = security_task_getscheduler(p);
@@ -6538,7 +6597,7 @@ SYSCALL_DEFINE1(sched_getscheduler, pid_t, pid)
retval = p->policy
| (p->sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0);
}
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
return retval;
}
@@ -6556,7 +6615,7 @@ SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param)
if (!param || pid < 0)
return -EINVAL;
- read_lock(&tasklist_lock);
+ rcu_read_lock();
p = find_process_by_pid(pid);
retval = -ESRCH;
if (!p)
@@ -6567,7 +6626,7 @@ SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param)
goto out_unlock;
lp.sched_priority = p->rt_priority;
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
/*
* This one might sleep, we cannot do it with a spinlock held ...
@@ -6577,7 +6636,7 @@ SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param)
return retval;
out_unlock:
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
return retval;
}
@@ -6588,22 +6647,18 @@ long sched_setaffinity(pid_t pid, const struct cpumask *in_mask)
int retval;
get_online_cpus();
- read_lock(&tasklist_lock);
+ rcu_read_lock();
p = find_process_by_pid(pid);
if (!p) {
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
put_online_cpus();
return -ESRCH;
}
- /*
- * It is not safe to call set_cpus_allowed with the
- * tasklist_lock held. We will bump the task_struct's
- * usage count and then drop tasklist_lock.
- */
+ /* Prevent p going away */
get_task_struct(p);
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
if (!alloc_cpumask_var(&cpus_allowed, GFP_KERNEL)) {
retval = -ENOMEM;
@@ -6684,10 +6739,12 @@ SYSCALL_DEFINE3(sched_setaffinity, pid_t, pid, unsigned int, len,
long sched_getaffinity(pid_t pid, struct cpumask *mask)
{
struct task_struct *p;
+ unsigned long flags;
+ struct rq *rq;
int retval;
get_online_cpus();
- read_lock(&tasklist_lock);
+ rcu_read_lock();
retval = -ESRCH;
p = find_process_by_pid(pid);
@@ -6698,10 +6755,12 @@ long sched_getaffinity(pid_t pid, struct cpumask *mask)
if (retval)
goto out_unlock;
+ rq = task_rq_lock(p, &flags);
cpumask_and(mask, &p->cpus_allowed, cpu_online_mask);
+ task_rq_unlock(rq, &flags);
out_unlock:
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
put_online_cpus();
return retval;
@@ -6940,6 +6999,8 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
{
struct task_struct *p;
unsigned int time_slice;
+ unsigned long flags;
+ struct rq *rq;
int retval;
struct timespec t;
@@ -6947,7 +7008,7 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
return -EINVAL;
retval = -ESRCH;
- read_lock(&tasklist_lock);
+ rcu_read_lock();
p = find_process_by_pid(pid);
if (!p)
goto out_unlock;
@@ -6956,15 +7017,17 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
if (retval)
goto out_unlock;
- time_slice = p->sched_class->get_rr_interval(p);
+ rq = task_rq_lock(p, &flags);
+ time_slice = p->sched_class->get_rr_interval(rq, p);
+ task_rq_unlock(rq, &flags);
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
jiffies_to_timespec(time_slice, &t);
retval = copy_to_user(interval, &t, sizeof(t)) ? -EFAULT : 0;
return retval;
out_unlock:
- read_unlock(&tasklist_lock);
+ rcu_read_unlock();
return retval;
}
@@ -7055,6 +7118,7 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
spin_lock_irqsave(&rq->lock, flags);
__sched_fork(idle);
+ idle->state = TASK_RUNNING;
idle->se.exec_start = sched_clock();
cpumask_copy(&idle->cpus_allowed, cpumask_of(cpu));
@@ -7149,7 +7213,19 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
struct rq *rq;
int ret = 0;
+ /*
+ * Serialize against TASK_WAKING so that ttwu() and wunt() can
+ * drop the rq->lock and still rely on ->cpus_allowed.
+ */
+again:
+ while (task_is_waking(p))
+ cpu_relax();
rq = task_rq_lock(p, &flags);
+ if (task_is_waking(p)) {
+ task_rq_unlock(rq, &flags);
+ goto again;
+ }
+
if (!cpumask_intersects(new_mask, cpu_active_mask)) {
ret = -EINVAL;
goto out;
@@ -7178,7 +7254,7 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
get_task_struct(mt);
task_rq_unlock(rq, &flags);
- wake_up_process(rq->migration_thread);
+ wake_up_process(mt);
put_task_struct(mt);
wait_for_completion(&req.done);
tlb_migrate_finish(p->mm);
@@ -7205,7 +7281,7 @@ EXPORT_SYMBOL_GPL(set_cpus_allowed_ptr);
static int __migrate_task(struct task_struct *p, int src_cpu, int dest_cpu)
{
struct rq *rq_dest, *rq_src;
- int ret = 0, on_rq;
+ int ret = 0;
if (unlikely(!cpu_active(dest_cpu)))
return ret;
@@ -7217,19 +7293,17 @@ static int __migrate_task(struct task_struct *p, int src_cpu, int dest_cpu)
/* Already moved. */
if (task_cpu(p) != src_cpu)
goto done;
- /* Waking up, don't get in the way of try_to_wake_up(). */
- if (p->state == TASK_WAKING)
- goto fail;
/* Affinity changed (again). */
if (!cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
goto fail;
- on_rq = p->se.on_rq;
- if (on_rq)
+ /*
+ * If we're not on a rq, the next wake-up will ensure we're
+ * placed properly.
+ */
+ if (p->se.on_rq) {
deactivate_task(rq_src, p, 0);
-
- set_task_cpu(p, dest_cpu);
- if (on_rq) {
+ set_task_cpu(p, dest_cpu);
activate_task(rq_dest, p, 0);
check_preempt_curr(rq_dest, p, 0);
}
@@ -7308,57 +7382,29 @@ static int migration_thread(void *data)
}
#ifdef CONFIG_HOTPLUG_CPU
-
-static int __migrate_task_irq(struct task_struct *p, int src_cpu, int dest_cpu)
-{
- int ret;
-
- local_irq_disable();
- ret = __migrate_task(p, src_cpu, dest_cpu);
- local_irq_enable();
- return ret;
-}
-
/*
* Figure out where task on dead CPU should go, use force if necessary.
*/
-static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
+void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
{
- int dest_cpu;
- const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(dead_cpu));
-
-again:
- /* Look for allowed, online CPU in same node. */
- for_each_cpu_and(dest_cpu, nodemask, cpu_active_mask)
- if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
- goto move;
-
- /* Any allowed, online CPU? */
- dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_active_mask);
- if (dest_cpu < nr_cpu_ids)
- goto move;
-
- /* No more Mr. Nice Guy. */
- if (dest_cpu >= nr_cpu_ids) {
- cpuset_cpus_allowed_locked(p, &p->cpus_allowed);
- dest_cpu = cpumask_any_and(cpu_active_mask, &p->cpus_allowed);
+ struct rq *rq = cpu_rq(dead_cpu);
+ int needs_cpu, uninitialized_var(dest_cpu);
+ unsigned long flags;
- /*
- * Don't tell them about moving exiting tasks or
- * kernel threads (both mm NULL), since they never
- * leave kernel.
- */
- if (p->mm && printk_ratelimit()) {
- printk(KERN_INFO "process %d (%s) no "
- "longer affine to cpu%d\n",
- task_pid_nr(p), p->comm, dead_cpu);
- }
- }
+ local_irq_save(flags);
-move:
- /* It can have affinity changed while we were choosing. */
- if (unlikely(!__migrate_task_irq(p, dead_cpu, dest_cpu)))
- goto again;
+ spin_lock(&rq->lock);
+ needs_cpu = (task_cpu(p) == dead_cpu) && (p->state != TASK_WAKING);
+ if (needs_cpu)
+ dest_cpu = select_fallback_rq(dead_cpu, p);
+ spin_unlock(&rq->lock);
+ /*
+ * It can only fail if we race with set_cpus_allowed(),
+ * in the racer should migrate the task anyway.
+ */
+ if (needs_cpu)
+ __migrate_task(p, dead_cpu, dest_cpu);
+ local_irq_restore(flags);
}
/*
@@ -7752,14 +7798,23 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
cpu_rq(cpu)->migration_thread = NULL;
break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- cpuset_lock(); /* around calls to cpuset_cpus_allowed_lock() */
- migrate_live_tasks(cpu);
+ case CPU_POST_DEAD:
+ /*
+ * Bring the migration thread down in CPU_POST_DEAD event,
+ * since the timers should have got migrated by now and thus
+ * we should not see a deadlock between trying to kill the
+ * migration thread and the sched_rt_period_timer.
+ */
rq = cpu_rq(cpu);
kthread_stop(rq->migration_thread);
put_task_struct(rq->migration_thread);
rq->migration_thread = NULL;
+ break;
+
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ migrate_live_tasks(cpu);
+ rq = cpu_rq(cpu);
/* Idle task back to normal (off runqueue, low prio) */
spin_lock_irq(&rq->lock);
update_rq_clock(rq);
@@ -7768,7 +7823,6 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
rq->idle->sched_class = &idle_sched_class;
migrate_dead_tasks(cpu);
spin_unlock_irq(&rq->lock);
- cpuset_unlock();
migrate_nr_uninterruptible(rq);
BUG_ON(rq->nr_running != 0);
calc_global_load_remove(rq);
@@ -8112,6 +8166,9 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu)
struct rq *rq = cpu_rq(cpu);
struct sched_domain *tmp;
+ for (tmp = sd; tmp; tmp = tmp->parent)
+ tmp->span_weight = cpumask_weight(sched_domain_span(tmp));
+
/* Remove the sched domains which do not contribute to scheduling. */
for (tmp = sd; tmp; ) {
struct sched_domain *parent = tmp->parent;
@@ -10099,13 +10156,13 @@ void sched_move_task(struct task_struct *tsk)
#ifdef CONFIG_FAIR_GROUP_SCHED
if (tsk->sched_class->moved_group)
- tsk->sched_class->moved_group(tsk);
+ tsk->sched_class->moved_group(tsk, on_rq);
#endif
if (unlikely(running))
tsk->sched_class->set_curr_task(rq);
if (on_rq)
- enqueue_task(rq, tsk, 0);
+ enqueue_task(rq, tsk, 0, false);
task_rq_unlock(rq, &flags);
}
@@ -10877,12 +10934,30 @@ static void cpuacct_charge(struct task_struct *tsk, u64 cputime)
}
/*
+ * When CONFIG_VIRT_CPU_ACCOUNTING is enabled one jiffy can be very large
+ * in cputime_t units. As a result, cpuacct_update_stats calls
+ * percpu_counter_add with values large enough to always overflow the
+ * per cpu batch limit causing bad SMP scalability.
+ *
+ * To fix this we scale percpu_counter_batch by cputime_one_jiffy so we
+ * batch the same amount of time with CONFIG_VIRT_CPU_ACCOUNTING disabled
+ * and enabled. We cap it at INT_MAX which is the largest allowed batch value.
+ */
+#ifdef CONFIG_SMP
+#define CPUACCT_BATCH \
+ min_t(long, percpu_counter_batch * cputime_one_jiffy, INT_MAX)
+#else
+#define CPUACCT_BATCH 0
+#endif
+
+/*
* Charge the system/user time to the task's accounting group.
*/
static void cpuacct_update_stats(struct task_struct *tsk,
enum cpuacct_stat_index idx, cputime_t val)
{
struct cpuacct *ca;
+ int batch = CPUACCT_BATCH;
if (unlikely(!cpuacct_subsys.active))
return;
@@ -10891,7 +10966,7 @@ static void cpuacct_update_stats(struct task_struct *tsk,
ca = task_ca(tsk);
do {
- percpu_counter_add(&ca->cpustat[idx], val);
+ __percpu_counter_add(&ca->cpustat[idx], val, batch);
ca = ca->parent;
} while (ca);
rcu_read_unlock();
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 6988cf0..6f836a8 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -423,7 +423,6 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
P(se.nr_failed_migrations_running);
P(se.nr_failed_migrations_hot);
P(se.nr_forced_migrations);
- P(se.nr_forced2_migrations);
P(se.nr_wakeups);
P(se.nr_wakeups_sync);
P(se.nr_wakeups_migrate);
@@ -499,7 +498,6 @@ void proc_sched_set_task(struct task_struct *p)
p->se.nr_failed_migrations_running = 0;
p->se.nr_failed_migrations_hot = 0;
p->se.nr_forced_migrations = 0;
- p->se.nr_forced2_migrations = 0;
p->se.nr_wakeups = 0;
p->se.nr_wakeups_sync = 0;
p->se.nr_wakeups_migrate = 0;
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index d80812d..01e311e 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -488,6 +488,7 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr,
curr->sum_exec_runtime += delta_exec;
schedstat_add(cfs_rq, exec_clock, delta_exec);
delta_exec_weighted = calc_delta_fair(delta_exec, curr);
+
curr->vruntime += delta_exec_weighted;
update_min_vruntime(cfs_rq);
}
@@ -743,16 +744,26 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
se->vruntime = vruntime;
}
+#define ENQUEUE_WAKEUP 1
+#define ENQUEUE_MIGRATE 2
+
static void
-enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int wakeup)
+enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
{
/*
+ * Update the normalized vruntime before updating min_vruntime
+ * through callig update_curr().
+ */
+ if (!(flags & ENQUEUE_WAKEUP) || (flags & ENQUEUE_MIGRATE))
+ se->vruntime += cfs_rq->min_vruntime;
+
+ /*
* Update run-time statistics of the 'current'.
*/
update_curr(cfs_rq);
account_entity_enqueue(cfs_rq, se);
- if (wakeup) {
+ if (flags & ENQUEUE_WAKEUP) {
place_entity(cfs_rq, se, 0);
enqueue_sleeper(cfs_rq, se);
}
@@ -806,6 +817,14 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int sleep)
__dequeue_entity(cfs_rq, se);
account_entity_dequeue(cfs_rq, se);
update_min_vruntime(cfs_rq);
+
+ /*
+ * Normalize the entity after updating the min_vruntime because the
+ * update can refer to the ->curr item and we need to reflect this
+ * movement in our normalized position.
+ */
+ if (!sleep)
+ se->vruntime -= cfs_rq->min_vruntime;
}
/*
@@ -1012,17 +1031,24 @@ static inline void hrtick_update(struct rq *rq)
* increased. Here we update the fair scheduling stats and
* then put the task into the rbtree:
*/
-static void enqueue_task_fair(struct rq *rq, struct task_struct *p, int wakeup)
+static void
+enqueue_task_fair(struct rq *rq, struct task_struct *p, int wakeup, bool head)
{
struct cfs_rq *cfs_rq;
struct sched_entity *se = &p->se;
+ int flags = 0;
+
+ if (wakeup)
+ flags |= ENQUEUE_WAKEUP;
+ if (p->state == TASK_WAKING)
+ flags |= ENQUEUE_MIGRATE;
for_each_sched_entity(se) {
if (se->on_rq)
break;
cfs_rq = cfs_rq_of(se);
- enqueue_entity(cfs_rq, se, wakeup);
- wakeup = 1;
+ enqueue_entity(cfs_rq, se, flags);
+ flags = ENQUEUE_WAKEUP;
}
hrtick_update(rq);
@@ -1098,6 +1124,14 @@ static void yield_task_fair(struct rq *rq)
#ifdef CONFIG_SMP
+static void task_waking_fair(struct rq *rq, struct task_struct *p)
+{
+ struct sched_entity *se = &p->se;
+ struct cfs_rq *cfs_rq = cfs_rq_of(se);
+
+ se->vruntime -= cfs_rq->min_vruntime;
+}
+
#ifdef CONFIG_FAIR_GROUP_SCHED
/*
* effective_load() calculates the load change as seen from the root_task_group
@@ -1216,6 +1250,7 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync)
* effect of the currently running task from the load
* of the current CPU:
*/
+ rcu_read_lock();
if (sync) {
tg = task_group(current);
weight = current->se.load.weight;
@@ -1241,6 +1276,7 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync)
balanced = !this_load ||
100*(this_load + effective_load(tg, this_cpu, weight, weight)) <=
imbalance*(load + effective_load(tg, prev_cpu, 0, weight));
+ rcu_read_unlock();
/*
* If the currently running task will sleep within
@@ -1348,6 +1384,56 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
}
/*
+ * Try and locate an idle CPU in the sched_domain.
+ */
+static int select_idle_sibling(struct task_struct *p, int target)
+{
+ int cpu = smp_processor_id();
+ int prev_cpu = task_cpu(p);
+ struct sched_domain *sd;
+ int i;
+
+ /*
+ * If the task is going to be woken-up on this cpu and if it is
+ * already idle, then it is the right target.
+ */
+ if (target == cpu && idle_cpu(cpu))
+ return cpu;
+
+ /*
+ * If the task is going to be woken-up on the cpu where it previously
+ * ran and if it is currently idle, then it the right target.
+ */
+ if (target == prev_cpu && idle_cpu(prev_cpu))
+ return prev_cpu;
+
+ /*
+ * Otherwise, iterate the domains and find an elegible idle cpu.
+ */
+ for_each_domain(target, sd) {
+ if (!(sd->flags & SD_SHARE_PKG_RESOURCES))
+ break;
+
+ for_each_cpu_and(i, sched_domain_span(sd), &p->cpus_allowed) {
+ if (idle_cpu(i)) {
+ target = i;
+ break;
+ }
+ }
+
+ /*
+ * Lets stop looking for an idle sibling when we reached
+ * the domain that spans the current cpu and prev_cpu.
+ */
+ if (cpumask_test_cpu(cpu, sched_domain_span(sd)) &&
+ cpumask_test_cpu(prev_cpu, sched_domain_span(sd)))
+ break;
+ }
+
+ return target;
+}
+
+/*
* sched_balance_self: balance the current task (running on cpu) in domains
* that have the 'flag' flag set. In practice, this is SD_BALANCE_FORK and
* SD_BALANCE_EXEC.
@@ -1358,7 +1444,8 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
*
* preempt must be disabled.
*/
-static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags)
+static int
+select_task_rq_fair(struct rq *rq, struct task_struct *p, int sd_flag, int wake_flags)
{
struct sched_domain *tmp, *affine_sd = NULL, *sd = NULL;
int cpu = smp_processor_id();
@@ -1375,7 +1462,6 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
new_cpu = prev_cpu;
}
- rcu_read_lock();
for_each_domain(cpu, tmp) {
if (!(tmp->flags & SD_LOAD_BALANCE))
continue;
@@ -1404,38 +1490,14 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
want_sd = 0;
}
- if (want_affine && (tmp->flags & SD_WAKE_AFFINE)) {
- int candidate = -1, i;
-
- if (cpumask_test_cpu(prev_cpu, sched_domain_span(tmp)))
- candidate = cpu;
-
- /*
- * Check for an idle shared cache.
- */
- if (tmp->flags & SD_PREFER_SIBLING) {
- if (candidate == cpu) {
- if (!cpu_rq(prev_cpu)->cfs.nr_running)
- candidate = prev_cpu;
- }
-
- if (candidate == -1 || candidate == cpu) {
- for_each_cpu(i, sched_domain_span(tmp)) {
- if (!cpumask_test_cpu(i, &p->cpus_allowed))
- continue;
- if (!cpu_rq(i)->cfs.nr_running) {
- candidate = i;
- break;
- }
- }
- }
- }
-
- if (candidate >= 0) {
- affine_sd = tmp;
- want_affine = 0;
- cpu = candidate;
- }
+ /*
+ * If both cpu and prev_cpu are part of this domain,
+ * cpu is a valid SD_WAKE_AFFINE target.
+ */
+ if (want_affine && (tmp->flags & SD_WAKE_AFFINE) &&
+ cpumask_test_cpu(prev_cpu, sched_domain_span(tmp))) {
+ affine_sd = tmp;
+ want_affine = 0;
}
if (!want_sd && !want_affine)
@@ -1448,23 +1510,28 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
sd = tmp;
}
+#ifdef CONFIG_FAIR_GROUP_SCHED
if (sched_feat(LB_SHARES_UPDATE)) {
/*
* Pick the largest domain to update shares over
*/
tmp = sd;
- if (affine_sd && (!tmp ||
- cpumask_weight(sched_domain_span(affine_sd)) >
- cpumask_weight(sched_domain_span(sd))))
+ if (affine_sd && (!tmp || affine_sd->span_weight > sd->span_weight))
tmp = affine_sd;
- if (tmp)
+ if (tmp) {
+ spin_unlock(&rq->lock);
update_shares(tmp);
+ spin_lock(&rq->lock);
+ }
}
+#endif
- if (affine_sd && wake_affine(affine_sd, p, sync)) {
- new_cpu = cpu;
- goto out;
+ if (affine_sd) {
+ if (cpu == prev_cpu || wake_affine(affine_sd, p, sync))
+ return select_idle_sibling(p, cpu);
+ else
+ return select_idle_sibling(p, prev_cpu);
}
while (sd) {
@@ -1495,10 +1562,10 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
/* Now try balancing at a lower domain level of new_cpu */
cpu = new_cpu;
- weight = cpumask_weight(sched_domain_span(sd));
+ weight = sd->span_weight;
sd = NULL;
for_each_domain(cpu, tmp) {
- if (weight <= cpumask_weight(sched_domain_span(tmp)))
+ if (weight <= tmp->span_weight)
break;
if (tmp->flags & sd_flag)
sd = tmp;
@@ -1506,8 +1573,6 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
/* while loop will break here if sd == NULL */
}
-out:
- rcu_read_unlock();
return new_cpu;
}
#endif /* CONFIG_SMP */
@@ -1911,28 +1976,32 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
}
/*
- * Share the fairness runtime between parent and child, thus the
- * total amount of pressure for CPU stays equal - new tasks
- * get a chance to run but frequent forkers are not allowed to
- * monopolize the CPU. Note: the parent runqueue is locked,
- * the child is not running yet.
+ * called on fork with the child task as argument from the parent's context
+ * - child not yet on the tasklist
+ * - preemption disabled
*/
-static void task_new_fair(struct rq *rq, struct task_struct *p)
+static void task_fork_fair(struct task_struct *p)
{
- struct cfs_rq *cfs_rq = task_cfs_rq(p);
+ struct cfs_rq *cfs_rq = task_cfs_rq(current);
struct sched_entity *se = &p->se, *curr = cfs_rq->curr;
int this_cpu = smp_processor_id();
+ struct rq *rq = this_rq();
+ unsigned long flags;
+
+ spin_lock_irqsave(&rq->lock, flags);
+
+ update_rq_clock(rq);
- sched_info_queued(p);
+ if (unlikely(task_cpu(p) != this_cpu))
+ __set_task_cpu(p, this_cpu);
update_curr(cfs_rq);
+
if (curr)
se->vruntime = curr->vruntime;
place_entity(cfs_rq, se, 1);
- /* 'curr' will be NULL if the child belongs to a different group */
- if (sysctl_sched_child_runs_first && this_cpu == task_cpu(p) &&
- curr && entity_before(curr, se)) {
+ if (sysctl_sched_child_runs_first && curr && entity_before(curr, se)) {
/*
* Upon rescheduling, sched_class::put_prev_task() will place
* 'current' within the tree based on its new key value.
@@ -1941,7 +2010,9 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
resched_task(rq->curr);
}
- enqueue_task_fair(rq, p, 0);
+ se->vruntime -= cfs_rq->min_vruntime;
+
+ spin_unlock_irqrestore(&rq->lock, flags);
}
/*
@@ -1994,30 +2065,27 @@ static void set_curr_task_fair(struct rq *rq)
}
#ifdef CONFIG_FAIR_GROUP_SCHED
-static void moved_group_fair(struct task_struct *p)
+static void moved_group_fair(struct task_struct *p, int on_rq)
{
struct cfs_rq *cfs_rq = task_cfs_rq(p);
update_curr(cfs_rq);
- place_entity(cfs_rq, &p->se, 1);
+ if (!on_rq)
+ place_entity(cfs_rq, &p->se, 1);
}
#endif
-unsigned int get_rr_interval_fair(struct task_struct *task)
+unsigned int get_rr_interval_fair(struct rq *rq, struct task_struct *task)
{
struct sched_entity *se = &task->se;
- unsigned long flags;
- struct rq *rq;
unsigned int rr_interval = 0;
/*
* Time slice is 0 for SCHED_OTHER tasks that are on an otherwise
* idle runqueue:
*/
- rq = task_rq_lock(task, &flags);
if (rq->cfs.load.weight)
rr_interval = NS_TO_JIFFIES(sched_slice(&rq->cfs, se));
- task_rq_unlock(rq, &flags);
return rr_interval;
}
@@ -2043,11 +2111,13 @@ static const struct sched_class fair_sched_class = {
.move_one_task = move_one_task_fair,
.rq_online = rq_online_fair,
.rq_offline = rq_offline_fair,
+
+ .task_waking = task_waking_fair,
#endif
.set_curr_task = set_curr_task_fair,
.task_tick = task_tick_fair,
- .task_new = task_new_fair,
+ .task_fork = task_fork_fair,
.prio_changed = prio_changed_fair,
.switched_to = switched_to_fair,
diff --git a/kernel/sched_idletask.c b/kernel/sched_idletask.c
index b133a28..93ad2e7 100644
--- a/kernel/sched_idletask.c
+++ b/kernel/sched_idletask.c
@@ -6,7 +6,8 @@
*/
#ifdef CONFIG_SMP
-static int select_task_rq_idle(struct task_struct *p, int sd_flag, int flags)
+static int
+select_task_rq_idle(struct rq *rq, struct task_struct *p, int sd_flag, int flags)
{
return task_cpu(p); /* IDLE tasks as never migrated */
}
@@ -97,7 +98,7 @@ static void prio_changed_idle(struct rq *rq, struct task_struct *p,
check_preempt_curr(rq, p, 0);
}
-unsigned int get_rr_interval_idle(struct task_struct *task)
+unsigned int get_rr_interval_idle(struct rq *rq, struct task_struct *task)
{
return 0;
}
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index a4d790c..af24fab 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -194,7 +194,7 @@ static inline struct rt_rq *group_rt_rq(struct sched_rt_entity *rt_se)
return rt_se->my_q;
}
-static void enqueue_rt_entity(struct sched_rt_entity *rt_se);
+static void enqueue_rt_entity(struct sched_rt_entity *rt_se, bool head);
static void dequeue_rt_entity(struct sched_rt_entity *rt_se);
static void sched_rt_rq_enqueue(struct rt_rq *rt_rq)
@@ -204,7 +204,7 @@ static void sched_rt_rq_enqueue(struct rt_rq *rt_rq)
if (rt_rq->rt_nr_running) {
if (rt_se && !on_rt_rq(rt_se))
- enqueue_rt_entity(rt_se);
+ enqueue_rt_entity(rt_se, false);
if (rt_rq->highest_prio.curr < curr->prio)
resched_task(curr);
}
@@ -803,7 +803,7 @@ void dec_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
dec_rt_group(rt_se, rt_rq);
}
-static void __enqueue_rt_entity(struct sched_rt_entity *rt_se)
+static void __enqueue_rt_entity(struct sched_rt_entity *rt_se, bool head)
{
struct rt_rq *rt_rq = rt_rq_of_se(rt_se);
struct rt_prio_array *array = &rt_rq->active;
@@ -819,7 +819,10 @@ static void __enqueue_rt_entity(struct sched_rt_entity *rt_se)
if (group_rq && (rt_rq_throttled(group_rq) || !group_rq->rt_nr_running))
return;
- list_add_tail(&rt_se->run_list, queue);
+ if (head)
+ list_add(&rt_se->run_list, queue);
+ else
+ list_add_tail(&rt_se->run_list, queue);
__set_bit(rt_se_prio(rt_se), array->bitmap);
inc_rt_tasks(rt_se, rt_rq);
@@ -856,11 +859,11 @@ static void dequeue_rt_stack(struct sched_rt_entity *rt_se)
}
}
-static void enqueue_rt_entity(struct sched_rt_entity *rt_se)
+static void enqueue_rt_entity(struct sched_rt_entity *rt_se, bool head)
{
dequeue_rt_stack(rt_se);
for_each_sched_rt_entity(rt_se)
- __enqueue_rt_entity(rt_se);
+ __enqueue_rt_entity(rt_se, head);
}
static void dequeue_rt_entity(struct sched_rt_entity *rt_se)
@@ -871,21 +874,22 @@ static void dequeue_rt_entity(struct sched_rt_entity *rt_se)
struct rt_rq *rt_rq = group_rt_rq(rt_se);
if (rt_rq && rt_rq->rt_nr_running)
- __enqueue_rt_entity(rt_se);
+ __enqueue_rt_entity(rt_se, false);
}
}
/*
* Adding/removing a task to/from a priority array:
*/
-static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)
+static void
+enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup, bool head)
{
struct sched_rt_entity *rt_se = &p->rt;
if (wakeup)
rt_se->timeout = 0;
- enqueue_rt_entity(rt_se);
+ enqueue_rt_entity(rt_se, head);
if (!task_current(rq, p) && p->rt.nr_cpus_allowed > 1)
enqueue_pushable_task(rq, p);
@@ -938,10 +942,9 @@ static void yield_task_rt(struct rq *rq)
#ifdef CONFIG_SMP
static int find_lowest_rq(struct task_struct *task);
-static int select_task_rq_rt(struct task_struct *p, int sd_flag, int flags)
+static int
+select_task_rq_rt(struct rq *rq, struct task_struct *p, int sd_flag, int flags)
{
- struct rq *rq = task_rq(p);
-
if (sd_flag != SD_BALANCE_WAKE)
return smp_processor_id();
@@ -1485,7 +1488,7 @@ static void post_schedule_rt(struct rq *rq)
* If we are not running and we are not going to reschedule soon, we should
* try to push tasks away now
*/
-static void task_wake_up_rt(struct rq *rq, struct task_struct *p)
+static void task_woken_rt(struct rq *rq, struct task_struct *p)
{
if (!task_running(rq, p) &&
!test_tsk_need_resched(rq->curr) &&
@@ -1734,7 +1737,7 @@ static void set_curr_task_rt(struct rq *rq)
dequeue_pushable_task(rq, p);
}
-unsigned int get_rr_interval_rt(struct task_struct *task)
+unsigned int get_rr_interval_rt(struct rq *rq, struct task_struct *task)
{
/*
* Time slice is 0 for SCHED_FIFO tasks
@@ -1766,7 +1769,7 @@ static const struct sched_class rt_sched_class = {
.rq_offline = rq_offline_rt,
.pre_schedule = pre_schedule_rt,
.post_schedule = post_schedule_rt,
- .task_wake_up = task_wake_up_rt,
+ .task_woken = task_woken_rt,
.switched_from = switched_from_rt,
#endif
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 0cccb6c..22cf21e 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -369,11 +369,18 @@ static int function_stat_show(struct seq_file *m, void *v)
{
struct ftrace_profile *rec = v;
char str[KSYM_SYMBOL_LEN];
+ int ret = 0;
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
- static DEFINE_MUTEX(mutex);
static struct trace_seq s;
unsigned long long avg;
#endif
+ mutex_lock(&ftrace_profile_lock);
+
+ /* we raced with function_profile_reset() */
+ if (unlikely(rec->counter == 0)) {
+ ret = -EBUSY;
+ goto out;
+ }
kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
seq_printf(m, " %-30.30s %10lu", str, rec->counter);
@@ -383,17 +390,17 @@ static int function_stat_show(struct seq_file *m, void *v)
avg = rec->time;
do_div(avg, rec->counter);
- mutex_lock(&mutex);
trace_seq_init(&s);
trace_print_graph_duration(rec->time, &s);
trace_seq_puts(&s, " ");
trace_print_graph_duration(avg, &s);
trace_print_seq(m, &s);
- mutex_unlock(&mutex);
#endif
seq_putc(m, '\n');
+out:
+ mutex_unlock(&ftrace_profile_lock);
- return 0;
+ return ret;
}
static void ftrace_profile_reset(struct ftrace_profile_stat *stat)
@@ -1473,6 +1480,8 @@ static void *t_start(struct seq_file *m, loff_t *pos)
if (*pos > 0)
return t_hash_start(m, pos);
iter->flags |= FTRACE_ITER_PRINTALL;
+ /* reset in case of seek/pread */
+ iter->flags &= ~FTRACE_ITER_HASH;
return iter;
}
@@ -2393,7 +2402,7 @@ static const struct file_operations ftrace_filter_fops = {
.open = ftrace_filter_open,
.read = seq_read,
.write = ftrace_filter_write,
- .llseek = ftrace_regex_lseek,
+ .llseek = no_llseek,
.release = ftrace_filter_release,
};
diff --git a/mm/bounce.c b/mm/bounce.c
index a2b76a5..1d5fa08 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -115,8 +115,8 @@ static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
*/
vfrom = page_address(fromvec->bv_page) + tovec->bv_offset;
- flush_dcache_page(tovec->bv_page);
bounce_copy_vec(tovec, vfrom);
+ flush_dcache_page(tovec->bv_page);
}
}
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 2047465..6d27a5b 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -551,19 +551,19 @@ static inline int pageblock_free(struct page *page)
/* Return the start of the next active pageblock after a given page */
static struct page *next_active_pageblock(struct page *page)
{
- int pageblocks_stride;
-
/* Ensure the starting page is pageblock-aligned */
BUG_ON(page_to_pfn(page) & (pageblock_nr_pages - 1));
- /* Move forward by at least 1 * pageblock_nr_pages */
- pageblocks_stride = 1;
-
/* If the entire pageblock is free, move to the end of free page */
- if (pageblock_free(page))
- pageblocks_stride += page_order(page) - pageblock_order;
+ if (pageblock_free(page)) {
+ int order;
+ /* be careful. we don't have locks, page_order can be changed.*/
+ order = page_order(page);
+ if ((order < MAX_ORDER) && (order >= pageblock_order))
+ return page + (1 << order);
+ }
- return page + (pageblocks_stride * pageblock_nr_pages);
+ return page + pageblock_nr_pages;
}
/* Checks if this range of memory is likely to be hot-removable. */
diff --git a/net/irda/irlan/irlan_common.c b/net/irda/irlan/irlan_common.c
index 315ead3..cfef331 100644
--- a/net/irda/irlan/irlan_common.c
+++ b/net/irda/irlan/irlan_common.c
@@ -1101,7 +1101,7 @@ int irlan_extract_param(__u8 *buf, char *name, char *value, __u16 *len)
memcpy(&val_len, buf+n, 2); /* To avoid alignment problems */
le16_to_cpus(&val_len); n+=2;
- if (val_len > 1016) {
+ if (val_len >= 1016) {
IRDA_DEBUG(2, "%s(), parameter length to long\n", __func__ );
return -RSP_INVALID_COMMAND_FORMAT;
}
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 2370ab4..4c32700 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -717,17 +717,18 @@ gss_pipe_release(struct inode *inode)
struct rpc_inode *rpci = RPC_I(inode);
struct gss_upcall_msg *gss_msg;
+restart:
spin_lock(&inode->i_lock);
- while (!list_empty(&rpci->in_downcall)) {
+ list_for_each_entry(gss_msg, &rpci->in_downcall, list) {
- gss_msg = list_entry(rpci->in_downcall.next,
- struct gss_upcall_msg, list);
+ if (!list_empty(&gss_msg->msg.list))
+ continue;
gss_msg->msg.errno = -EPIPE;
atomic_inc(&gss_msg->count);
__gss_unhash_msg(gss_msg);
spin_unlock(&inode->i_lock);
gss_release_msg(gss_msg);
- spin_lock(&inode->i_lock);
+ goto restart;
}
spin_unlock(&inode->i_lock);
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 27a2378..ea1e6de 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -47,7 +47,7 @@ static void rpc_purge_list(struct rpc_inode *rpci, struct list_head *head,
return;
do {
msg = list_entry(head->next, struct rpc_pipe_msg, list);
- list_del(&msg->list);
+ list_del_init(&msg->list);
msg->errno = err;
destroy_msg(msg);
} while (!list_empty(head));
@@ -207,7 +207,7 @@ rpc_pipe_release(struct inode *inode, struct file *filp)
if (msg != NULL) {
spin_lock(&inode->i_lock);
msg->errno = -EAGAIN;
- list_del(&msg->list);
+ list_del_init(&msg->list);
spin_unlock(&inode->i_lock);
rpci->ops->destroy_msg(msg);
}
@@ -267,7 +267,7 @@ rpc_pipe_read(struct file *filp, char __user *buf, size_t len, loff_t *offset)
if (res < 0 || msg->len == msg->copied) {
filp->private_data = NULL;
spin_lock(&inode->i_lock);
- list_del(&msg->list);
+ list_del_init(&msg->list);
spin_unlock(&inode->i_lock);
rpci->ops->destroy_msg(msg);
}
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 6a60c5a..62cfc0c 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -1358,6 +1358,9 @@ int cfg80211_wext_giwessid(struct net_device *dev,
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
+ data->flags = 0;
+ data->length = 0;
+
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
return cfg80211_ibss_wext_giwessid(dev, info, data, ssid);
diff --git a/net/wireless/wext.c b/net/wireless/wext.c
index 60fe577..fddcf9c 100644
--- a/net/wireless/wext.c
+++ b/net/wireless/wext.c
@@ -854,6 +854,22 @@ static int ioctl_standard_iw_point(struct iw_point *iwp, unsigned int cmd,
}
}
+ if (IW_IS_GET(cmd) && !(descr->flags & IW_DESCR_FLAG_NOMAX)) {
+ /*
+ * If this is a GET, but not NOMAX, it means that the extra
+ * data is not bounded by userspace, but by max_tokens. Thus
+ * set the length to max_tokens. This matches the extra data
+ * allocation.
+ * The driver should fill it with the number of tokens it
+ * provided, and it may check iwp->length rather than having
+ * knowledge of max_tokens. If the driver doesn't change the
+ * iwp->length, this ioctl just copies back max_token tokens
+ * filled with zeroes. Hopefully the driver isn't claiming
+ * them to be valid data.
+ */
+ iwp->length = descr->max_tokens;
+ }
+
err = handler(dev, info, (union iwreq_data *) iwp, extra);
iwp->length += essid_compat;
diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c
index d0d721c..1f133fe 100644
--- a/sound/core/seq/oss/seq_oss_init.c
+++ b/sound/core/seq/oss/seq_oss_init.c
@@ -280,13 +280,10 @@ snd_seq_oss_open(struct file *file, int level)
return 0;
_error:
- snd_seq_oss_writeq_delete(dp->writeq);
- snd_seq_oss_readq_delete(dp->readq);
snd_seq_oss_synth_cleanup(dp);
snd_seq_oss_midi_cleanup(dp);
- delete_port(dp);
delete_seq_queue(dp->queue);
- kfree(dp);
+ delete_port(dp);
return rc;
}
@@ -349,8 +346,10 @@ create_port(struct seq_oss_devinfo *dp)
static int
delete_port(struct seq_oss_devinfo *dp)
{
- if (dp->port < 0)
+ if (dp->port < 0) {
+ kfree(dp);
return 0;
+ }
debug_printk(("delete_port %i\n", dp->port));
return snd_seq_event_port_detach(dp->cseq, dp->port);
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 7b4e74d..06c118c 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6589,7 +6589,7 @@ static struct hda_input_mux alc883_lenovo_nb0763_capture_source = {
.num_items = 4,
.items = {
{ "Mic", 0x0 },
- { "iMic", 0x1 },
+ { "Int Mic", 0x1 },
{ "Line", 0x2 },
{ "CD", 0x4 },
},
@@ -8038,8 +8038,8 @@ static struct snd_kcontrol_new alc883_lenovo_nb0763_mixer[] = {
HDA_CODEC_MUTE("CD Playback Switch", 0x0b, 0x04, HDA_INPUT),
HDA_CODEC_VOLUME("Mic Playback Volume", 0x0b, 0x0, HDA_INPUT),
HDA_CODEC_MUTE("Mic Playback Switch", 0x0b, 0x0, HDA_INPUT),
- HDA_CODEC_VOLUME("iMic Playback Volume", 0x0b, 0x1, HDA_INPUT),
- HDA_CODEC_MUTE("iMic Playback Switch", 0x0b, 0x1, HDA_INPUT),
+ HDA_CODEC_VOLUME("Int Mic Playback Volume", 0x0b, 0x1, HDA_INPUT),
+ HDA_CODEC_MUTE("Int Mic Playback Switch", 0x0b, 0x1, HDA_INPUT),
{ } /* end */
};
@@ -12389,6 +12389,9 @@ static int alc268_new_analog_output(struct alc_spec *spec, hda_nid_t nid,
dac = 0x02;
break;
case 0x15:
+ case 0x1a: /* ALC259/269 only */
+ case 0x1b: /* ALC259/269 only */
+ case 0x21: /* ALC269vb has this pin, too */
dac = 0x03;
break;
default:
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index a31a8cd..3c6d141 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -49,6 +49,7 @@ static inline void callchain_init(struct callchain_node *node)
INIT_LIST_HEAD(&node->children);
INIT_LIST_HEAD(&node->val);
+ node->children_hit = 0;
node->parent = NULL;
node->hit = 0;
}
--
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