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Date: Tue, 28 Oct 2008 11:55:10 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
Subject: [git pull] core / iommu / xen fixes
Linus,
Please pull the latest core-fixes-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-fixes-for-linus
[ the commits look x86-ish, but got filed here because the iommu fixes
affect lib/swiotlb.c, and the Xen fixes affect drivers/xen/ ]
Thanks,
Ingo
------------------>
FUJITA Tomonori (3):
swiotlb: remove panic for alloc_coherent failure
x86: use GFP_DMA for 24bit coherent_dma_mask
x86: restore the old swiotlb alloc_coherent behavior
Heiko Carstens (1):
lockdep: fix irqs on/off ip tracing
Isaku Yamahata (2):
xen: portability clean up and some minor clean up for xencomm.c
xen: compilation fix of drivers/xen/events.c on IA64
Jeremy Fitzhardinge (1):
xen: don't reload cr3 on suspend
Paul Mundt (1):
kernel/resource: fix reserve_region_with_split() section mismatch
qinghuang feng (1):
lockdep: minor fix for debug_show_all_locks()
roel kluin (1):
printk: remove unused code from kernel/printk.c
arch/x86/include/asm/dma-mapping.h | 4 ++-
arch/x86/kernel/pci-swiotlb_64.c | 14 ++++++++++++-
drivers/xen/events.c | 2 +-
drivers/xen/manage.c | 2 -
drivers/xen/xencomm.c | 23 +++-----------------
kernel/lockdep.c | 17 +++++++--------
kernel/printk.c | 39 ------------------------------------
kernel/resource.c | 2 +-
lib/swiotlb.c | 6 +++-
9 files changed, 34 insertions(+), 75 deletions(-)
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index 4a5397b..7f225a4 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -255,9 +255,11 @@ static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp)
{
-#ifdef CONFIG_X86_64
unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
+ if (dma_mask <= DMA_24BIT_MASK)
+ gfp |= GFP_DMA;
+#ifdef CONFIG_X86_64
if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
gfp |= GFP_DMA32;
#endif
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
index c4ce033..3c539d1 100644
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -18,9 +18,21 @@ swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size,
return swiotlb_map_single(hwdev, phys_to_virt(paddr), size, direction);
}
+static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flags)
+{
+ void *vaddr;
+
+ vaddr = dma_generic_alloc_coherent(hwdev, size, dma_handle, flags);
+ if (vaddr)
+ return vaddr;
+
+ return swiotlb_alloc_coherent(hwdev, size, dma_handle, flags);
+}
+
struct dma_mapping_ops swiotlb_dma_ops = {
.mapping_error = swiotlb_dma_mapping_error,
- .alloc_coherent = swiotlb_alloc_coherent,
+ .alloc_coherent = x86_swiotlb_alloc_coherent,
.free_coherent = swiotlb_free_coherent,
.map_single = swiotlb_map_single_phys,
.unmap_single = swiotlb_unmap_single,
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 9ce1ab6..1e3b934 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -774,7 +774,7 @@ void xen_poll_irq(int irq)
poll.nr_ports = 1;
poll.timeout = 0;
- poll.ports = &evtchn;
+ set_xen_guest_handle(poll.ports, &evtchn);
if (HYPERVISOR_sched_op(SCHEDOP_poll, &poll) != 0)
BUG();
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index d0e87cb..9b91617 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -39,8 +39,6 @@ static int xen_suspend(void *data)
BUG_ON(!irqs_disabled());
- load_cr3(swapper_pg_dir);
-
err = device_power_down(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen_suspend: device_power_down failed: %d\n",
diff --git a/drivers/xen/xencomm.c b/drivers/xen/xencomm.c
index 797cb4e..a240b2c 100644
--- a/drivers/xen/xencomm.c
+++ b/drivers/xen/xencomm.c
@@ -23,13 +23,7 @@
#include <asm/page.h>
#include <xen/xencomm.h>
#include <xen/interface/xen.h>
-#ifdef __ia64__
-#include <asm/xen/xencomm.h> /* for is_kern_addr() */
-#endif
-
-#ifdef HAVE_XEN_PLATFORM_COMPAT_H
-#include <xen/platform-compat.h>
-#endif
+#include <asm/xen/xencomm.h> /* for xencomm_is_phys_contiguous() */
static int xencomm_init(struct xencomm_desc *desc,
void *buffer, unsigned long bytes)
@@ -157,20 +151,11 @@ static int xencomm_create(void *buffer, unsigned long bytes,
return 0;
}
-/* check if memory address is within VMALLOC region */
-static int is_phys_contiguous(unsigned long addr)
-{
- if (!is_kernel_addr(addr))
- return 0;
-
- return (addr < VMALLOC_START) || (addr >= VMALLOC_END);
-}
-
static struct xencomm_handle *xencomm_create_inline(void *ptr)
{
unsigned long paddr;
- BUG_ON(!is_phys_contiguous((unsigned long)ptr));
+ BUG_ON(!xencomm_is_phys_contiguous((unsigned long)ptr));
paddr = (unsigned long)xencomm_pa(ptr);
BUG_ON(paddr & XENCOMM_INLINE_FLAG);
@@ -202,7 +187,7 @@ struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes)
int rc;
struct xencomm_desc *desc;
- if (is_phys_contiguous((unsigned long)ptr))
+ if (xencomm_is_phys_contiguous((unsigned long)ptr))
return xencomm_create_inline(ptr);
rc = xencomm_create(ptr, bytes, &desc, GFP_KERNEL);
@@ -219,7 +204,7 @@ struct xencomm_handle *__xencomm_map_no_alloc(void *ptr, unsigned long bytes,
int rc;
struct xencomm_desc *desc = NULL;
- if (is_phys_contiguous((unsigned long)ptr))
+ if (xencomm_is_phys_contiguous((unsigned long)ptr))
return xencomm_create_inline(ptr);
rc = xencomm_create_mini(ptr, bytes, xc_desc,
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index dbda475..06e1571 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2169,12 +2169,11 @@ void early_boot_irqs_on(void)
/*
* Hardirqs will be enabled:
*/
-void trace_hardirqs_on_caller(unsigned long a0)
+void trace_hardirqs_on_caller(unsigned long ip)
{
struct task_struct *curr = current;
- unsigned long ip;
- time_hardirqs_on(CALLER_ADDR0, a0);
+ time_hardirqs_on(CALLER_ADDR0, ip);
if (unlikely(!debug_locks || current->lockdep_recursion))
return;
@@ -2188,7 +2187,6 @@ void trace_hardirqs_on_caller(unsigned long a0)
}
/* we'll do an OFF -> ON transition: */
curr->hardirqs_enabled = 1;
- ip = (unsigned long) __builtin_return_address(0);
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
return;
@@ -2224,11 +2222,11 @@ EXPORT_SYMBOL(trace_hardirqs_on);
/*
* Hardirqs were disabled:
*/
-void trace_hardirqs_off_caller(unsigned long a0)
+void trace_hardirqs_off_caller(unsigned long ip)
{
struct task_struct *curr = current;
- time_hardirqs_off(CALLER_ADDR0, a0);
+ time_hardirqs_off(CALLER_ADDR0, ip);
if (unlikely(!debug_locks || current->lockdep_recursion))
return;
@@ -2241,7 +2239,7 @@ void trace_hardirqs_off_caller(unsigned long a0)
* We have done an ON -> OFF transition:
*/
curr->hardirqs_enabled = 0;
- curr->hardirq_disable_ip = _RET_IP_;
+ curr->hardirq_disable_ip = ip;
curr->hardirq_disable_event = ++curr->irq_events;
debug_atomic_inc(&hardirqs_off_events);
} else
@@ -3417,9 +3415,10 @@ retry:
}
printk(" ignoring it.\n");
unlock = 0;
+ } else {
+ if (count != 10)
+ printk(KERN_CONT " locked it.\n");
}
- if (count != 10)
- printk(" locked it.\n");
do_each_thread(g, p) {
/*
diff --git a/kernel/printk.c b/kernel/printk.c
index 6341af7..f492f15 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -233,45 +233,6 @@ static inline void boot_delay_msec(void)
#endif
/*
- * Return the number of unread characters in the log buffer.
- */
-static int log_buf_get_len(void)
-{
- return logged_chars;
-}
-
-/*
- * Copy a range of characters from the log buffer.
- */
-int log_buf_copy(char *dest, int idx, int len)
-{
- int ret, max;
- bool took_lock = false;
-
- if (!oops_in_progress) {
- spin_lock_irq(&logbuf_lock);
- took_lock = true;
- }
-
- max = log_buf_get_len();
- if (idx < 0 || idx >= max) {
- ret = -1;
- } else {
- if (len > max)
- len = max;
- ret = len;
- idx += (log_end - max);
- while (len-- > 0)
- dest[len] = LOG_BUF(idx + len);
- }
-
- if (took_lock)
- spin_unlock_irq(&logbuf_lock);
-
- return ret;
-}
-
-/*
* Commands to do_syslog:
*
* 0 -- Close the log. Currently a NOP.
diff --git a/kernel/resource.c b/kernel/resource.c
index 4089d12..7fec0e4 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -571,7 +571,7 @@ static void __init __reserve_region_with_split(struct resource *root,
}
-void reserve_region_with_split(struct resource *root,
+void __init reserve_region_with_split(struct resource *root,
resource_size_t start, resource_size_t end,
const char *name)
{
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index f8eebd4..78330c3 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -497,8 +497,10 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
(unsigned long long)*hwdev->dma_mask,
(unsigned long long)dev_addr);
- panic("swiotlb_alloc_coherent: allocated memory is out of "
- "range for device");
+
+ /* DMA_TO_DEVICE to avoid memcpy in unmap_single */
+ unmap_single(hwdev, ret, size, DMA_TO_DEVICE);
+ return NULL;
}
*dma_handle = dev_addr;
return ret;
--
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