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Date: Thu, 18 Jun 2009 12:31:48 +0930
From: Rusty Russell <rusty@...tcorp.com.au>
To: Christoph Lameter <cl@...ux-foundation.org>
Cc: Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
David Howells <dhowells@...hat.com>,
Ingo Molnar <mingo@...e.hu>,
Eric Dumazet <dada1@...mosbay.com>, davem@...emloft.net
Subject: Re: [this_cpu_xx 01/11] Introduce this_cpu_ptr() and generic this_cpu_* operations
On Thu, 18 Jun 2009 04:11:17 am Christoph Lameter wrote:
> It is possible to simply pass the full variable name of a percpu variable
> to this_cpu_* macros. See the patch of the vm statistics handling.
>
> It uses
>
> per_cpu_var(per_cpu_name_without_prefix)
>
> to generate the full name.
I have a patch to rip out the prefixes and use sparse annotations instead; I'll
dig it out...
OK, was a series of three. Probably bitrotted, but here they are:
alloc_percpu: rename percpu vars which cause name clashes.
Currently DECLARE_PER_CPU vars have per_cpu__ prefixed to them, and
this effectively puts them in a separate namespace. No surprise that
they clash with other names when that prefix is removed.
There may be others I've missed, but if so the transform is simple.
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
---
arch/ia64/kernel/crash.c | 4 ++--
arch/ia64/kernel/setup.c | 8 ++++----
arch/mn10300/kernel/kprobes.c | 2 +-
arch/powerpc/platforms/cell/interrupt.c | 14 +++++++-------
arch/x86/include/asm/processor.h | 2 +-
arch/x86/include/asm/timer.h | 5 +++--
arch/x86/kernel/cpu/common.c | 4 ++--
arch/x86/kernel/dumpstack_64.c | 2 +-
arch/x86/kernel/tsc.c | 4 ++--
arch/x86/kvm/svm.c | 14 +++++++-------
drivers/cpufreq/cpufreq.c | 16 ++++++++--------
drivers/s390/net/netiucv.c | 8 ++++----
kernel/lockdep.c | 11 ++++++-----
kernel/sched.c | 14 ++++++++------
kernel/softirq.c | 4 ++--
kernel/softlockup.c | 20 ++++++++++----------
mm/slab.c | 8 ++++----
mm/vmstat.c | 6 +++---
18 files changed, 75 insertions(+), 71 deletions(-)
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -50,7 +50,7 @@ final_note(void *buf)
extern void ia64_dump_cpu_regs(void *);
-static DEFINE_PER_CPU(struct elf_prstatus, elf_prstatus);
+static DEFINE_PER_CPU(struct elf_prstatus, elf_prstatus_pcpu);
void
crash_save_this_cpu(void)
@@ -59,7 +59,7 @@ crash_save_this_cpu(void)
unsigned long cfm, sof, sol;
int cpu = smp_processor_id();
- struct elf_prstatus *prstatus = &per_cpu(elf_prstatus, cpu);
+ struct elf_prstatus *prstatus = &per_cpu(elf_prstatus_pcpu, cpu);
elf_greg_t *dst = (elf_greg_t *)&(prstatus->pr_reg);
memset(prstatus, 0, sizeof(*prstatus));
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -939,7 +939,7 @@ cpu_init (void)
unsigned long num_phys_stacked;
pal_vm_info_2_u_t vmi;
unsigned int max_ctx;
- struct cpuinfo_ia64 *cpu_info;
+ struct cpuinfo_ia64 *cpuinfo;
void *cpu_data;
cpu_data = per_cpu_init();
@@ -972,15 +972,15 @@ cpu_init (void)
* depends on the data returned by identify_cpu(). We break the dependency by
* accessing cpu_data() through the canonical per-CPU address.
*/
- cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
- identify_cpu(cpu_info);
+ cpuinfo = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
+ identify_cpu(cpuinfo);
#ifdef CONFIG_MCKINLEY
{
# define FEATURE_SET 16
struct ia64_pal_retval iprv;
- if (cpu_info->family == 0x1f) {
+ if (cpuinfo->family == 0x1f) {
PAL_CALL_PHYS(iprv, PAL_PROC_GET_FEATURES, 0, FEATURE_SET, 0);
if ((iprv.status == 0) && (iprv.v0 & 0x80) && (iprv.v2 & 0x80))
PAL_CALL_PHYS(iprv, PAL_PROC_SET_FEATURES,
diff --git a/arch/mn10300/kernel/kprobes.c b/arch/mn10300/kernel/kprobes.c
--- a/arch/mn10300/kernel/kprobes.c
+++ b/arch/mn10300/kernel/kprobes.c
@@ -39,7 +39,7 @@ static kprobe_opcode_t current_kprobe_ss
static kprobe_opcode_t current_kprobe_ss_buf[MAX_INSN_SIZE + 2];
static unsigned long current_kprobe_bp_addr;
-DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
+DEFINE_PER_CPU(struct kprobe *, current_kprobe_pcpu) = NULL;
/* singlestep flag bits */
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -54,7 +54,7 @@ struct iic {
struct device_node *node;
};
-static DEFINE_PER_CPU(struct iic, iic);
+static DEFINE_PER_CPU(struct iic, iic_pcpu);
#define IIC_NODE_COUNT 2
static struct irq_host *iic_host;
@@ -82,7 +82,7 @@ static void iic_unmask(unsigned int irq)
static void iic_eoi(unsigned int irq)
{
- struct iic *iic = &__get_cpu_var(iic);
+ struct iic *iic = &__get_cpu_var(iic_pcpu);
out_be64(&iic->regs->prio, iic->eoi_stack[--iic->eoi_ptr]);
BUG_ON(iic->eoi_ptr < 0);
}
@@ -146,7 +146,7 @@ static unsigned int iic_get_irq(void)
struct iic *iic;
unsigned int virq;
- iic = &__get_cpu_var(iic);
+ iic = &__get_cpu_var(iic_pcpu);
*(unsigned long *) &pending =
in_be64((u64 __iomem *) &iic->regs->pending_destr);
if (!(pending.flags & CBE_IIC_IRQ_VALID))
@@ -161,12 +161,12 @@ static unsigned int iic_get_irq(void)
void iic_setup_cpu(void)
{
- out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
+ out_be64(&__get_cpu_var(iic_pcpu).regs->prio, 0xff);
}
u8 iic_get_target_id(int cpu)
{
- return per_cpu(iic, cpu).target_id;
+ return per_cpu(iic_pcpu, cpu).target_id;
}
EXPORT_SYMBOL_GPL(iic_get_target_id);
@@ -181,7 +181,7 @@ static inline int iic_ipi_to_irq(int ipi
void iic_cause_IPI(int cpu, int mesg)
{
- out_be64(&per_cpu(iic, cpu).regs->generate, (0xf - mesg) << 4);
+ out_be64(&per_cpu(iic_pcpu, cpu).regs->generate, (0xf - mesg) << 4);
}
struct irq_host *iic_get_irq_host(int node)
@@ -350,7 +350,7 @@ static void __init init_one_iic(unsigned
/* XXX FIXME: should locate the linux CPU number from the HW cpu
* number properly. We are lucky for now
*/
- struct iic *iic = &per_cpu(iic, hw_cpu);
+ struct iic *iic = &per_cpu(iic_pcpu, hw_cpu);
iic->regs = ioremap(addr, sizeof(struct cbe_iic_thread_regs));
BUG_ON(iic->regs == NULL);
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -377,7 +377,7 @@ union thread_xstate {
};
#ifdef CONFIG_X86_64
-DECLARE_PER_CPU(struct orig_ist, orig_ist);
+DECLARE_PER_CPU(struct orig_ist, orig_ist_pcpu);
#endif
extern void print_cpu_info(struct cpuinfo_x86 *);
diff --git a/arch/x86/include/asm/timer.h b/arch/x86/include/asm/timer.h
--- a/arch/x86/include/asm/timer.h
+++ b/arch/x86/include/asm/timer.h
@@ -42,13 +42,14 @@ extern int no_timer_check;
* -johnstul@...ibm.com "math is hard, lets go shopping!"
*/
-DECLARE_PER_CPU(unsigned long, cyc2ns);
+DECLARE_PER_CPU(unsigned long, percpu_cyc2ns);
#define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */
static inline unsigned long long __cycles_2_ns(unsigned long long cyc)
{
- return cyc * per_cpu(cyc2ns, smp_processor_id()) >> CYC2NS_SCALE_FACTOR;
+ return cyc * per_cpu(percpu_cyc2ns, smp_processor_id()) >>
+ CYC2NS_SCALE_FACTOR;
}
static inline unsigned long long cycles_2_ns(unsigned long long cyc)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -955,7 +955,7 @@ unsigned long kernel_eflags;
* Copies of the original ist values from the tss are only accessed during
* debugging, no special alignment required.
*/
-DEFINE_PER_CPU(struct orig_ist, orig_ist);
+DEFINE_PER_CPU(struct orig_ist, orig_ist_pcpu);
#else
@@ -980,7 +980,7 @@ void __cpuinit cpu_init(void)
{
int cpu = stack_smp_processor_id();
struct tss_struct *t = &per_cpu(init_tss, cpu);
- struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
+ struct orig_ist *orig_ist = &per_cpu(orig_ist_pcpu, cpu);
unsigned long v;
char *estacks = NULL;
struct task_struct *me;
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -40,7 +40,7 @@ static unsigned long *in_exception_stack
* 'stack' is in one of them:
*/
for (k = 0; k < N_EXCEPTION_STACKS; k++) {
- unsigned long end = per_cpu(orig_ist, cpu).ist[k];
+ unsigned long end = per_cpu(orig_ist_pcpu, cpu).ist[k];
/*
* Is 'stack' above this exception frame's end?
* If yes then skip to the next frame.
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -570,7 +570,7 @@ EXPORT_SYMBOL(recalibrate_cpu_khz);
* -johnstul@...ibm.com "math is hard, lets go shopping!"
*/
-DEFINE_PER_CPU(unsigned long, cyc2ns);
+DEFINE_PER_CPU(unsigned long, percpu_cyc2ns);
static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
{
@@ -580,7 +580,7 @@ static void set_cyc2ns_scale(unsigned lo
local_irq_save(flags);
sched_clock_idle_sleep_event();
- scale = &per_cpu(cyc2ns, cpu);
+ scale = &per_cpu(percpu_cyc2ns, cpu);
rdtscll(tsc_now);
ns_now = __cycles_2_ns(tsc_now);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -90,7 +90,7 @@ struct svm_cpu_data {
struct page *save_area;
};
-static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
+static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data_pcpu);
static uint32_t svm_features;
struct svm_init_data {
@@ -275,7 +275,7 @@ static void svm_hardware_enable(void *ga
printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
return;
}
- svm_data = per_cpu(svm_data, me);
+ svm_data = per_cpu(svm_data_pcpu, me);
if (!svm_data) {
printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
@@ -301,12 +301,12 @@ static void svm_cpu_uninit(int cpu)
static void svm_cpu_uninit(int cpu)
{
struct svm_cpu_data *svm_data
- = per_cpu(svm_data, raw_smp_processor_id());
+ = per_cpu(svm_data_pcpu, raw_smp_processor_id());
if (!svm_data)
return;
- per_cpu(svm_data, raw_smp_processor_id()) = NULL;
+ per_cpu(svm_data_pcpu, raw_smp_processor_id()) = NULL;
__free_page(svm_data->save_area);
kfree(svm_data);
}
@@ -325,7 +325,7 @@ static int svm_cpu_init(int cpu)
if (!svm_data->save_area)
goto err_1;
- per_cpu(svm_data, cpu) = svm_data;
+ per_cpu(svm_data_pcpu, cpu) = svm_data;
return 0;
@@ -1508,7 +1508,7 @@ static void reload_tss(struct kvm_vcpu *
{
int cpu = raw_smp_processor_id();
- struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
+ struct svm_cpu_data *svm_data = per_cpu(svm_data_pcpu, cpu);
svm_data->tss_desc->type = 9; /* available 32/64-bit TSS */
load_TR_desc();
}
@@ -1517,7 +1517,7 @@ static void pre_svm_run(struct vcpu_svm
{
int cpu = raw_smp_processor_id();
- struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
+ struct svm_cpu_data *svm_data = per_cpu(svm_data_pcpu, cpu);
svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
if (svm->vcpu.cpu != cpu ||
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -62,14 +62,14 @@ static DEFINE_SPINLOCK(cpufreq_driver_lo
* - Governor routines that can be called in cpufreq hotplug path should not
* take this sem as top level hotplug notifier handler takes this.
*/
-static DEFINE_PER_CPU(int, policy_cpu);
+static DEFINE_PER_CPU(int, policy_cpu_pcpu);
static DEFINE_PER_CPU(struct rw_semaphore, cpu_policy_rwsem);
#define lock_policy_rwsem(mode, cpu) \
int lock_policy_rwsem_##mode \
(int cpu) \
{ \
- int policy_cpu = per_cpu(policy_cpu, cpu); \
+ int policy_cpu = per_cpu(policy_cpu_pcpu, cpu); \
BUG_ON(policy_cpu == -1); \
down_##mode(&per_cpu(cpu_policy_rwsem, policy_cpu)); \
if (unlikely(!cpu_online(cpu))) { \
@@ -88,7 +88,7 @@ EXPORT_SYMBOL_GPL(lock_policy_rwsem_writ
void unlock_policy_rwsem_read(int cpu)
{
- int policy_cpu = per_cpu(policy_cpu, cpu);
+ int policy_cpu = per_cpu(policy_cpu_pcpu, cpu);
BUG_ON(policy_cpu == -1);
up_read(&per_cpu(cpu_policy_rwsem, policy_cpu));
}
@@ -96,7 +96,7 @@ EXPORT_SYMBOL_GPL(unlock_policy_rwsem_re
void unlock_policy_rwsem_write(int cpu)
{
- int policy_cpu = per_cpu(policy_cpu, cpu);
+ int policy_cpu = per_cpu(policy_cpu_pcpu, cpu);
BUG_ON(policy_cpu == -1);
up_write(&per_cpu(cpu_policy_rwsem, policy_cpu));
}
@@ -822,7 +822,7 @@ static int cpufreq_add_dev(struct sys_de
cpumask_copy(policy->cpus, cpumask_of(cpu));
/* Initially set CPU itself as the policy_cpu */
- per_cpu(policy_cpu, cpu) = cpu;
+ per_cpu(policy_cpu_pcpu, cpu) = cpu;
lock_policy_rwsem_write(cpu);
init_completion(&policy->kobj_unregister);
@@ -866,7 +866,7 @@ static int cpufreq_add_dev(struct sys_de
/* Set proper policy_cpu */
unlock_policy_rwsem_write(cpu);
- per_cpu(policy_cpu, cpu) = managed_policy->cpu;
+ per_cpu(policy_cpu_pcpu, cpu) = managed_policy->cpu;
if (lock_policy_rwsem_write(cpu) < 0)
goto err_out_driver_exit;
@@ -929,7 +929,7 @@ static int cpufreq_add_dev(struct sys_de
spin_lock_irqsave(&cpufreq_driver_lock, flags);
for_each_cpu(j, policy->cpus) {
per_cpu(cpufreq_cpu_data, j) = policy;
- per_cpu(policy_cpu, j) = policy->cpu;
+ per_cpu(policy_cpu_pcpu, j) = policy->cpu;
}
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
@@ -1937,7 +1937,7 @@ static int __init cpufreq_core_init(void
int cpu;
for_each_possible_cpu(cpu) {
- per_cpu(policy_cpu, cpu) = -1;
+ per_cpu(policy_cpu_pcpu, cpu) = -1;
init_rwsem(&per_cpu(cpu_policy_rwsem, cpu));
}
return 0;
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c
--- a/drivers/s390/net/netiucv.c
+++ b/drivers/s390/net/netiucv.c
@@ -98,7 +98,7 @@ MODULE_DESCRIPTION ("Linux for S/390 IUC
debug_event(iucv_dbf_##name,level,(void*)(addr),len); \
} while (0)
-DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf);
+DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf_pcpu);
/* Allow to sort out low debug levels early to avoid wasted sprints */
static inline int iucv_dbf_passes(debug_info_t *dbf_grp, int level)
@@ -110,11 +110,11 @@ static inline int iucv_dbf_passes(debug_
do { \
if (iucv_dbf_passes(iucv_dbf_##name, level)) { \
char* iucv_dbf_txt_buf = \
- get_cpu_var(iucv_dbf_txt_buf); \
+ get_cpu_var(iucv_dbf_txt_buf_pcpu); \
sprintf(iucv_dbf_txt_buf, text); \
debug_text_event(iucv_dbf_##name, level, \
iucv_dbf_txt_buf); \
- put_cpu_var(iucv_dbf_txt_buf); \
+ put_cpu_var(iucv_dbf_txt_buf_pcpu); \
} \
} while (0)
@@ -462,7 +462,7 @@ static debug_info_t *iucv_dbf_data = NUL
static debug_info_t *iucv_dbf_data = NULL;
static debug_info_t *iucv_dbf_trace = NULL;
-DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf);
+DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf_pcpu);
static void iucv_unregister_dbf_views(void)
{
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -135,7 +135,8 @@ static inline struct lock_class *hlock_c
}
#ifdef CONFIG_LOCK_STAT
-static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS], lock_stats);
+static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS],
+ percpu_lock_stats);
static int lock_point(unsigned long points[], unsigned long ip)
{
@@ -181,7 +182,7 @@ struct lock_class_stats lock_stats(struc
memset(&stats, 0, sizeof(struct lock_class_stats));
for_each_possible_cpu(cpu) {
struct lock_class_stats *pcs =
- &per_cpu(lock_stats, cpu)[class - lock_classes];
+ &per_cpu(percpu_lock_stats, cpu)[class - lock_classes];
for (i = 0; i < ARRAY_SIZE(stats.contention_point); i++)
stats.contention_point[i] += pcs->contention_point[i];
@@ -208,7 +209,7 @@ void clear_lock_stats(struct lock_class
for_each_possible_cpu(cpu) {
struct lock_class_stats *cpu_stats =
- &per_cpu(lock_stats, cpu)[class - lock_classes];
+ &per_cpu(percpu_lock_stats, cpu)[class - lock_classes];
memset(cpu_stats, 0, sizeof(struct lock_class_stats));
}
@@ -218,12 +219,12 @@ void clear_lock_stats(struct lock_class
static struct lock_class_stats *get_lock_stats(struct lock_class *class)
{
- return &get_cpu_var(lock_stats)[class - lock_classes];
+ return &get_cpu_var(percpu_lock_stats)[class - lock_classes];
}
static void put_lock_stats(struct lock_class_stats *stats)
{
- put_cpu_var(lock_stats);
+ put_cpu_var(percpu_lock_stats);
}
static void lock_release_holdtime(struct held_lock *hlock)
diff --git a/kernel/sched.c b/kernel/sched.c
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -315,12 +315,14 @@ struct task_group root_task_group;
/* Default task group's sched entity on each cpu */
static DEFINE_PER_CPU(struct sched_entity, init_sched_entity);
/* Default task group's cfs_rq on each cpu */
-static DEFINE_PER_CPU(struct cfs_rq, init_cfs_rq) ____cacheline_aligned_in_smp;
+static DEFINE_PER_CPU(struct cfs_rq, percpu_init_cfs_rq)
+ ____cacheline_aligned_in_smp;
#endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED
static DEFINE_PER_CPU(struct sched_rt_entity, init_sched_rt_entity);
-static DEFINE_PER_CPU(struct rt_rq, init_rt_rq) ____cacheline_aligned_in_smp;
+static DEFINE_PER_CPU(struct rt_rq, percpu_init_rt_rq)
+ ____cacheline_aligned_in_smp;
#endif /* CONFIG_RT_GROUP_SCHED */
#else /* !CONFIG_USER_SCHED */
#define root_task_group init_task_group
@@ -7213,14 +7215,14 @@ struct static_sched_domain {
*/
#ifdef CONFIG_SCHED_SMT
static DEFINE_PER_CPU(struct static_sched_domain, cpu_domains);
-static DEFINE_PER_CPU(struct static_sched_group, sched_group_cpus);
+static DEFINE_PER_CPU(struct static_sched_group, sched_group_cpus_pcpu);
static int
cpu_to_cpu_group(int cpu, const struct cpumask *cpu_map,
struct sched_group **sg, struct cpumask *unused)
{
if (sg)
- *sg = &per_cpu(sched_group_cpus, cpu).sg;
+ *sg = &per_cpu(sched_group_cpus_pcpu, cpu).sg;
return cpu;
}
#endif /* CONFIG_SCHED_SMT */
@@ -8408,7 +8410,7 @@ void __init sched_init(void)
* tasks in rq->cfs (i.e init_task_group->se[] != NULL).
*/
init_tg_cfs_entry(&init_task_group,
- &per_cpu(init_cfs_rq, i),
+ &per_cpu(percpu_init_cfs_rq, i),
&per_cpu(init_sched_entity, i), i, 1,
root_task_group.se[i]);
@@ -8423,7 +8425,7 @@ void __init sched_init(void)
#elif defined CONFIG_USER_SCHED
init_tg_rt_entry(&root_task_group, &rq->rt, NULL, i, 0, NULL);
init_tg_rt_entry(&init_task_group,
- &per_cpu(init_rt_rq, i),
+ &per_cpu(percpu_init_rt_rq, i),
&per_cpu(init_sched_rt_entity, i), i, 1,
root_task_group.rt_se[i]);
#endif
diff --git a/kernel/softirq.c b/kernel/softirq.c
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -602,7 +602,7 @@ void __init softirq_init(void)
open_softirq(HI_SOFTIRQ, tasklet_hi_action);
}
-static int ksoftirqd(void * __bind_cpu)
+static int run_ksoftirqd(void *__bind_cpu)
{
set_current_state(TASK_INTERRUPTIBLE);
@@ -714,7 +714,7 @@ static int __cpuinit cpu_callback(struct
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
- p = kthread_create(ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
+ p = kthread_create(run_ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
if (IS_ERR(p)) {
printk("ksoftirqd for %i failed\n", hotcpu);
return NOTIFY_BAD;
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -95,28 +95,28 @@ void softlockup_tick(void)
void softlockup_tick(void)
{
int this_cpu = smp_processor_id();
- unsigned long touch_timestamp = per_cpu(touch_timestamp, this_cpu);
- unsigned long print_timestamp;
+ unsigned long touch_ts = per_cpu(touch_timestamp, this_cpu);
+ unsigned long print_ts;
struct pt_regs *regs = get_irq_regs();
unsigned long now;
/* Is detection switched off? */
if (!per_cpu(watchdog_task, this_cpu) || softlockup_thresh <= 0) {
/* Be sure we don't false trigger if switched back on */
- if (touch_timestamp)
+ if (touch_ts)
per_cpu(touch_timestamp, this_cpu) = 0;
return;
}
- if (touch_timestamp == 0) {
+ if (touch_ts == 0) {
__touch_softlockup_watchdog();
return;
}
- print_timestamp = per_cpu(print_timestamp, this_cpu);
+ print_ts = per_cpu(print_timestamp, this_cpu);
/* report at most once a second */
- if (print_timestamp == touch_timestamp || did_panic)
+ if (print_ts == touch_ts || did_panic)
return;
/* do not print during early bootup: */
@@ -131,18 +131,18 @@ void softlockup_tick(void)
* Wake up the high-prio watchdog task twice per
* threshold timespan.
*/
- if (now > touch_timestamp + softlockup_thresh/2)
+ if (now > touch_ts + softlockup_thresh/2)
wake_up_process(per_cpu(watchdog_task, this_cpu));
/* Warn about unreasonable delays: */
- if (now <= (touch_timestamp + softlockup_thresh))
+ if (now <= (touch_ts + softlockup_thresh))
return;
- per_cpu(print_timestamp, this_cpu) = touch_timestamp;
+ per_cpu(print_timestamp, this_cpu) = touch_ts;
spin_lock(&print_lock);
printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %lus! [%s:%d]\n",
- this_cpu, now - touch_timestamp,
+ this_cpu, now - touch_ts,
current->comm, task_pid_nr(current));
print_modules();
print_irqtrace_events(current);
diff --git a/mm/slab.c b/mm/slab.c
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -933,17 +933,17 @@ static void next_reap_node(void)
*/
static void __cpuinit start_cpu_timer(int cpu)
{
- struct delayed_work *reap_work = &per_cpu(reap_work, cpu);
+ struct delayed_work *reap = &per_cpu(reap_work, cpu);
/*
* When this gets called from do_initcalls via cpucache_init(),
* init_workqueues() has already run, so keventd will be setup
* at that time.
*/
- if (keventd_up() && reap_work->work.func == NULL) {
+ if (keventd_up() && reap->work.func == NULL) {
init_reap_node(cpu);
- INIT_DELAYED_WORK(reap_work, cache_reap);
- schedule_delayed_work_on(cpu, reap_work,
+ INIT_DELAYED_WORK(reap, cache_reap);
+ schedule_delayed_work_on(cpu, reap,
__round_jiffies_relative(HZ, cpu));
}
}
diff --git a/mm/vmstat.c b/mm/vmstat.c
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -903,10 +903,10 @@ static void vmstat_update(struct work_st
static void __cpuinit start_cpu_timer(int cpu)
{
- struct delayed_work *vmstat_work = &per_cpu(vmstat_work, cpu);
+ struct delayed_work *vw = &per_cpu(vmstat_work, cpu);
- INIT_DELAYED_WORK_DEFERRABLE(vmstat_work, vmstat_update);
- schedule_delayed_work_on(cpu, vmstat_work, HZ + cpu);
+ INIT_DELAYED_WORK_DEFERRABLE(vw, vmstat_update);
+ schedule_delayed_work_on(cpu, vw, HZ + cpu);
}
/*
alloc_percpu: remove per_cpu__ prefix.
Now that the return from alloc_percpu is compatible with the address
of per-cpu vars, it makes sense to hand around the address of per-cpu
variables. To make this sane, we remove the per_cpu__ prefix we used
created to stop people accidentally using these vars directly.
Now we have sparse, we can use that (next patch).
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
---
arch/alpha/include/asm/percpu.h | 4 ++--
arch/cris/arch-v10/kernel/entry.S | 2 +-
arch/cris/arch-v32/mm/mmu.S | 2 +-
arch/ia64/include/asm/percpu.h | 4 ++--
arch/ia64/kernel/ia64_ksyms.c | 4 ++--
arch/ia64/mm/discontig.c | 2 +-
arch/parisc/lib/fixup.S | 8 ++++----
arch/powerpc/platforms/pseries/hvCall.S | 2 +-
arch/sparc/kernel/rtrap_64.S | 8 ++++----
arch/x86/include/asm/percpu.h | 20 ++++++++++----------
arch/x86/kernel/entry_64.S | 4 ++--
arch/x86/kernel/head_32.S | 2 +-
arch/x86/kernel/head_64.S | 2 +-
arch/x86/xen/xen-asm_32.S | 4 ++--
include/asm-generic/percpu.h | 2 +-
include/linux/percpu.h | 12 ++++++------
16 files changed, 41 insertions(+), 41 deletions(-)
diff --git a/arch/alpha/include/asm/percpu.h b/arch/alpha/include/asm/percpu.h
--- a/arch/alpha/include/asm/percpu.h
+++ b/arch/alpha/include/asm/percpu.h
@@ -7,7 +7,7 @@
* Determine the real variable name from the name visible in the
* kernel sources.
*/
-#define per_cpu_var(var) per_cpu__##var
+#define per_cpu_var(var) var
#ifdef CONFIG_SMP
@@ -43,7 +43,7 @@ extern unsigned long __per_cpu_offset[NR
unsigned long __ptr, tmp_gp; \
asm ( "br %1, 1f \n\
1: ldgp %1, 0(%1) \n\
- ldq %0, per_cpu__" #var"(%1)\t!literal" \
+ ldq %0, "#var"(%1)\t!literal" \
: "=&r"(__ptr), "=&r"(tmp_gp)); \
(typeof(&per_cpu_var(var)))(__ptr + (offset)); })
diff --git a/arch/cris/arch-v10/kernel/entry.S b/arch/cris/arch-v10/kernel/entry.S
--- a/arch/cris/arch-v10/kernel/entry.S
+++ b/arch/cris/arch-v10/kernel/entry.S
@@ -358,7 +358,7 @@ 1: btstq 12, $r1 ; Refill?
1: btstq 12, $r1 ; Refill?
bpl 2f
lsrq 24, $r1 ; Get PGD index (bit 24-31)
- move.d [per_cpu__current_pgd], $r0 ; PGD for the current process
+ move.d [current_pgd], $r0 ; PGD for the current process
move.d [$r0+$r1.d], $r0 ; Get PMD
beq 2f
nop
diff --git a/arch/cris/arch-v32/mm/mmu.S b/arch/cris/arch-v32/mm/mmu.S
--- a/arch/cris/arch-v32/mm/mmu.S
+++ b/arch/cris/arch-v32/mm/mmu.S
@@ -115,7 +115,7 @@ 3: ; Probably not in a loop, continue no
#ifdef CONFIG_SMP
move $s7, $acr ; PGD
#else
- move.d per_cpu__current_pgd, $acr ; PGD
+ move.d current_pgd, $acr ; PGD
#endif
; Look up PMD in PGD
lsrq 24, $r0 ; Get PMD index into PGD (bit 24-31)
diff --git a/arch/ia64/include/asm/percpu.h b/arch/ia64/include/asm/percpu.h
--- a/arch/ia64/include/asm/percpu.h
+++ b/arch/ia64/include/asm/percpu.h
@@ -9,7 +9,7 @@
#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
#ifdef __ASSEMBLY__
-# define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
+# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */
#else /* !__ASSEMBLY__ */
@@ -39,7 +39,7 @@ extern void *per_cpu_init(void);
* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
* more efficient.
*/
-#define __ia64_per_cpu_var(var) per_cpu__##var
+#define __ia64_per_cpu_var(var) var
#include <asm-generic/percpu.h>
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -29,9 +29,9 @@ EXPORT_SYMBOL(max_low_pfn); /* defined b
#endif
#include <asm/processor.h>
-EXPORT_SYMBOL(per_cpu__cpu_info);
+EXPORT_SYMBOL(cpu_info);
#ifdef CONFIG_SMP
-EXPORT_SYMBOL(per_cpu__local_per_cpu_offset);
+EXPORT_SYMBOL(local_per_cpu_offset);
#endif
#include <asm/uaccess.h>
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -360,7 +360,7 @@ static void __init initialize_pernode_da
cpu = 0;
node = node_cpuid[cpu].nid;
cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start +
- ((char *)&per_cpu__cpu_info - __per_cpu_start));
+ ((char *)&cpu_info - __per_cpu_start));
cpu0_cpu_info->node_data = mem_data[node].node_data;
}
#endif /* CONFIG_SMP */
diff --git a/arch/parisc/lib/fixup.S b/arch/parisc/lib/fixup.S
--- a/arch/parisc/lib/fixup.S
+++ b/arch/parisc/lib/fixup.S
@@ -36,8 +36,8 @@
#endif
/* t2 = &__per_cpu_offset[smp_processor_id()]; */
LDREGX \t2(\t1),\t2
- addil LT%per_cpu__exception_data,%r27
- LDREG RT%per_cpu__exception_data(%r1),\t1
+ addil LT%exception_data,%r27
+ LDREG RT%exception_data(%r1),\t1
/* t1 = &__get_cpu_var(exception_data) */
add,l \t1,\t2,\t1
/* t1 = t1->fault_ip */
@@ -46,8 +46,8 @@
#else
.macro get_fault_ip t1 t2
/* t1 = &__get_cpu_var(exception_data) */
- addil LT%per_cpu__exception_data,%r27
- LDREG RT%per_cpu__exception_data(%r1),\t2
+ addil LT%exception_data,%r27
+ LDREG RT%exception_data(%r1),\t2
/* t1 = t2->fault_ip */
LDREG EXCDATA_IP(\t2), \t1
.endm
diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S
--- a/arch/powerpc/platforms/pseries/hvCall.S
+++ b/arch/powerpc/platforms/pseries/hvCall.S
@@ -55,7 +55,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_PURR);
/* calculate address of stat structure r4 = opcode */ \
srdi r4,r4,2; /* index into array */ \
mulli r4,r4,HCALL_STAT_SIZE; \
- LOAD_REG_ADDR(r7, per_cpu__hcall_stats); \
+ LOAD_REG_ADDR(r7, hcall_stats); \
add r4,r4,r7; \
ld r7,PACA_DATA_OFFSET(r13); /* per cpu offset */ \
add r4,r4,r7; \
diff --git a/arch/sparc/kernel/rtrap_64.S b/arch/sparc/kernel/rtrap_64.S
--- a/arch/sparc/kernel/rtrap_64.S
+++ b/arch/sparc/kernel/rtrap_64.S
@@ -149,11 +149,11 @@ rtrap_irq:
rtrap_irq:
rtrap:
#ifndef CONFIG_SMP
- sethi %hi(per_cpu____cpu_data), %l0
- lduw [%l0 + %lo(per_cpu____cpu_data)], %l1
+ sethi %hi(__cpu_data), %l0
+ lduw [%l0 + %lo(__cpu_data)], %l1
#else
- sethi %hi(per_cpu____cpu_data), %l0
- or %l0, %lo(per_cpu____cpu_data), %l0
+ sethi %hi(__cpu_data), %l0
+ or %l0, %lo(__cpu_data), %l0
lduw [%l0 + %g5], %l1
#endif
cmp %l1, 0
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -66,13 +66,13 @@ DECLARE_PER_CPU(struct x8664_pda, pda);
*/
#ifdef CONFIG_SMP
#define PER_CPU(var, reg) \
- movl %fs:per_cpu__##this_cpu_off, reg; \
- lea per_cpu__##var(reg), reg
-#define PER_CPU_VAR(var) %fs:per_cpu__##var
+ movl %fs:this_cpu_off, reg; \
+ lea var(reg), reg
+#define PER_CPU_VAR(var) %fs:var
#else /* ! SMP */
#define PER_CPU(var, reg) \
- movl $per_cpu__##var, reg
-#define PER_CPU_VAR(var) per_cpu__##var
+ movl $var, reg
+#define PER_CPU_VAR(var) var
#endif /* SMP */
#else /* ...!ASSEMBLY */
@@ -162,11 +162,11 @@ do { \
ret__; \
})
-#define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var)
-#define x86_write_percpu(var, val) percpu_to_op("mov", per_cpu__##var, val)
-#define x86_add_percpu(var, val) percpu_to_op("add", per_cpu__##var, val)
-#define x86_sub_percpu(var, val) percpu_to_op("sub", per_cpu__##var, val)
-#define x86_or_percpu(var, val) percpu_to_op("or", per_cpu__##var, val)
+#define x86_read_percpu(var) percpu_from_op("mov", var)
+#define x86_write_percpu(var, val) percpu_to_op("mov", var, val)
+#define x86_add_percpu(var, val) percpu_to_op("add", var, val)
+#define x86_sub_percpu(var, val) percpu_to_op("sub", var, val)
+#define x86_or_percpu(var, val) percpu_to_op("or", var, val)
#endif /* !__ASSEMBLY__ */
#endif /* !CONFIG_X86_64 */
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1073,9 +1073,9 @@ ENTRY(\sym)
movq %rsp,%rdi /* pt_regs pointer */
xorl %esi,%esi /* no error code */
movq %gs:pda_data_offset, %rbp
- subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
+ subq $EXCEPTION_STKSZ, init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
call \do_sym
- addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
+ addq $EXCEPTION_STKSZ, init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
jmp paranoid_exit /* %ebx: no swapgs flag */
CFI_ENDPROC
END(\sym)
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -702,7 +702,7 @@ idt_descr:
.word 0 # 32 bit align gdt_desc.address
ENTRY(early_gdt_descr)
.word GDT_ENTRIES*8-1
- .long per_cpu__gdt_page /* Overwritten for secondary CPUs */
+ .long gdt_page /* Overwritten for secondary CPUs */
/*
* The boot_gdt must mirror the equivalent in setup.S and is
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -401,7 +401,7 @@ NEXT_PAGE(level2_spare_pgt)
.globl early_gdt_descr
early_gdt_descr:
.word GDT_ENTRIES*8-1
- .quad per_cpu__gdt_page
+ .quad gdt_page
ENTRY(phys_base)
/* This must match the first entry in level2_kernel_pgt */
diff --git a/arch/x86/xen/xen-asm_32.S b/arch/x86/xen/xen-asm_32.S
--- a/arch/x86/xen/xen-asm_32.S
+++ b/arch/x86/xen/xen-asm_32.S
@@ -164,9 +164,9 @@ ENTRY(xen_iret)
GET_THREAD_INFO(%eax)
movl TI_cpu(%eax),%eax
movl __per_cpu_offset(,%eax,4),%eax
- mov per_cpu__xen_vcpu(%eax),%eax
+ mov xen_vcpu(%eax),%eax
#else
- movl per_cpu__xen_vcpu, %eax
+ movl xen_vcpu, %eax
#endif
/* check IF state we're restoring */
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -7,7 +7,7 @@
* Determine the real variable name from the name visible in the
* kernel sources.
*/
-#define per_cpu_var(var) per_cpu__##var
+#define per_cpu_var(var) var
#ifdef CONFIG_SMP
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -11,7 +11,7 @@
#ifdef CONFIG_SMP
#define DEFINE_PER_CPU(type, name) \
__attribute__((__section__(".data.percpu"))) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+ PER_CPU_ATTRIBUTES __typeof__(type) name
#ifdef MODULE
#define SHARED_ALIGNED_SECTION ".data.percpu"
@@ -21,15 +21,15 @@
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
__attribute__((__section__(SHARED_ALIGNED_SECTION))) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name \
+ PER_CPU_ATTRIBUTES __typeof__(type) name \
____cacheline_aligned_in_smp
#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
__attribute__((__section__(".data.percpu.page_aligned"))) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+ PER_CPU_ATTRIBUTES __typeof__(type) name
#else
#define DEFINE_PER_CPU(type, name) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+ PER_CPU_ATTRIBUTES __typeof__(type) name
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
DEFINE_PER_CPU(type, name)
@@ -38,8 +38,8 @@
DEFINE_PER_CPU(type, name)
#endif
-#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
-#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
+#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(var)
#ifndef PERCPU_ENOUGH_ROOM
extern unsigned int percpu_reserve;
alloc_percpu: use __percpu annotation for sparse.
Add __percpu for sparse.
We have to make __kernel "__attribute__((address_space(0)))" so we can
cast to it.
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
Cc: Al Viro <viro@...iv.linux.org.uk>
---
include/asm-generic/percpu.h | 19 ++++++++++++-------
include/linux/compiler.h | 4 +++-
include/linux/percpu.h | 8 ++++----
3 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -45,7 +45,9 @@ extern unsigned long __per_cpu_offset[NR
* Only S390 provides its own means of moving the pointer.
*/
#ifndef SHIFT_PERCPU_PTR
-#define SHIFT_PERCPU_PTR(__p, __offset) RELOC_HIDE((__p), (__offset))
+/* Weird cast keeps both GCC and sparse happy. */
+#define SHIFT_PERCPU_PTR(__p, __offset) \
+ ((typeof(*__p) __kernel __force *)RELOC_HIDE((__p), (__offset)))
#endif
/*
@@ -61,16 +63,19 @@ extern unsigned long __per_cpu_offset[NR
(*SHIFT_PERCPU_PTR(&per_cpu_var(var), __my_cpu_offset))
/* Use RELOC_HIDE: some arch's SHIFT_PERCPU_PTR really want an identifier. */
+#define RELOC_PERCPU(addr, off) \
+ ((typeof(*addr) __kernel __force *)RELOC_HIDE((addr), (off)))
+
/**
* per_cpu_ptr - get a pointer to a particular cpu's allocated memory
- * @ptr: the pointer returned from alloc_percpu
+ * @ptr: the pointer returned from alloc_percpu, or &per-cpu var
* @cpu: the cpu whose memory you want to access
*
* Similar to per_cpu(), except for dynamic memory.
* cpu_possible(@cpu) must be true.
*/
#define per_cpu_ptr(ptr, cpu) \
- RELOC_HIDE((ptr), (per_cpu_offset(cpu)))
+ RELOC_PERCPU((ptr), (per_cpu_offset(cpu)))
/**
* __get_cpu_ptr - get a pointer to this cpu's allocated memory
@@ -78,8 +83,8 @@ extern unsigned long __per_cpu_offset[NR
*
* Similar to __get_cpu_var(), except for dynamic memory.
*/
-#define __get_cpu_ptr(ptr) RELOC_HIDE(ptr, my_cpu_offset)
-#define __raw_get_cpu_ptr(ptr) RELOC_HIDE(ptr, __my_cpu_offset)
+#define __get_cpu_ptr(ptr) RELOC_PERCPU(ptr, my_cpu_offset)
+#define __raw_get_cpu_ptr(ptr) RELOC_PERCPU(ptr, __my_cpu_offset)
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
extern void setup_per_cpu_areas(void);
@@ -100,7 +105,7 @@ extern void setup_per_cpu_areas(void);
#define PER_CPU_ATTRIBUTES
#endif
-#define DECLARE_PER_CPU(type, name) extern PER_CPU_ATTRIBUTES \
- __typeof__(type) per_cpu_var(name)
+#define DECLARE_PER_CPU(type, name) \
+ extern PER_CPU_ATTRIBUTES __percpu __typeof__(type) per_cpu_var(name)
#endif /* _ASM_GENERIC_PERCPU_H_ */
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -5,7 +5,7 @@
#ifdef __CHECKER__
# define __user __attribute__((noderef, address_space(1)))
-# define __kernel /* default address space */
+# define __kernel __attribute__((address_space(0)))
# define __safe __attribute__((safe))
# define __force __attribute__((force))
# define __nocast __attribute__((nocast))
@@ -15,6 +15,7 @@
# define __acquire(x) __context__(x,1)
# define __release(x) __context__(x,-1)
# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
+# define __percpu __attribute__((noderef, address_space(3)))
extern void __chk_user_ptr(const volatile void __user *);
extern void __chk_io_ptr(const volatile void __iomem *);
#else
@@ -32,6 +33,7 @@ extern void __chk_io_ptr(const volatile
# define __acquire(x) (void)0
# define __release(x) (void)0
# define __cond_lock(x,c) (c)
+# define __percpu
#endif
#ifdef __KERNEL__
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -11,7 +11,7 @@
#ifdef CONFIG_SMP
#define DEFINE_PER_CPU(type, name) \
__attribute__((__section__(".data.percpu"))) \
- PER_CPU_ATTRIBUTES __typeof__(type) name
+ PER_CPU_ATTRIBUTES __typeof__(type) __percpu name
#ifdef MODULE
#define SHARED_ALIGNED_SECTION ".data.percpu"
@@ -21,15 +21,15 @@
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
__attribute__((__section__(SHARED_ALIGNED_SECTION))) \
- PER_CPU_ATTRIBUTES __typeof__(type) name \
+ PER_CPU_ATTRIBUTES __typeof__(type) __percpu name \
____cacheline_aligned_in_smp
#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
__attribute__((__section__(".data.percpu.page_aligned"))) \
- PER_CPU_ATTRIBUTES __typeof__(type) name
+ PER_CPU_ATTRIBUTES __typeof__(type) __percpu name
#else
#define DEFINE_PER_CPU(type, name) \
- PER_CPU_ATTRIBUTES __typeof__(type) name
+ PER_CPU_ATTRIBUTES __typeof__(type) __percpu name
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
DEFINE_PER_CPU(type, name)
--
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