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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 17:02:58 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 17:02:58 -0800
commit72eb6a791459c87a0340318840bb3bd9252b627b (patch)
tree3bfb8ad99f9c7e511f37f72d57b56a2cea06d753 /kernel/watchdog.c
parent23d69b09b78c4876e134f104a3814c30747c53f1 (diff)
parent55ee4ef30241a62b700f79517e6d5ef2ddbefa67 (diff)
downloadlinux-linaro-stable-72eb6a791459c87a0340318840bb3bd9252b627b.tar.gz
Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (30 commits) gameport: use this_cpu_read instead of lookup x86: udelay: Use this_cpu_read to avoid address calculation x86: Use this_cpu_inc_return for nmi counter x86: Replace uses of current_cpu_data with this_cpu ops x86: Use this_cpu_ops to optimize code vmstat: User per cpu atomics to avoid interrupt disable / enable irq_work: Use per cpu atomics instead of regular atomics cpuops: Use cmpxchg for xchg to avoid lock semantics x86: this_cpu_cmpxchg and this_cpu_xchg operations percpu: Generic this_cpu_cmpxchg() and this_cpu_xchg support percpu,x86: relocate this_cpu_add_return() and friends connector: Use this_cpu operations xen: Use this_cpu_inc_return taskstats: Use this_cpu_ops random: Use this_cpu_inc_return fs: Use this_cpu_inc_return in buffer.c highmem: Use this_cpu_xx_return() operations vmstat: Use this_cpu_inc_return for vm statistics x86: Support for this_cpu_add, sub, dec, inc_return percpu: Generic support for this_cpu_add, sub, dec, inc_return ... Fixed up conflicts: in arch/x86/kernel/{apic/nmi.c, apic/x2apic_uv_x.c, process.c} as per Tejun.
Diffstat (limited to 'kernel/watchdog.c')
-rw-r--r--kernel/watchdog.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 6e7b575ac33c..d7ebdf4cea98 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -118,12 +118,12 @@ static void __touch_watchdog(void)
{
int this_cpu = smp_processor_id();
- __get_cpu_var(watchdog_touch_ts) = get_timestamp(this_cpu);
+ __this_cpu_write(watchdog_touch_ts, get_timestamp(this_cpu));
}
void touch_softlockup_watchdog(void)
{
- __raw_get_cpu_var(watchdog_touch_ts) = 0;
+ __this_cpu_write(watchdog_touch_ts, 0);
}
EXPORT_SYMBOL(touch_softlockup_watchdog);
@@ -167,12 +167,12 @@ void touch_softlockup_watchdog_sync(void)
/* watchdog detector functions */
static int is_hardlockup(void)
{
- unsigned long hrint = __get_cpu_var(hrtimer_interrupts);
+ unsigned long hrint = __this_cpu_read(hrtimer_interrupts);
- if (__get_cpu_var(hrtimer_interrupts_saved) == hrint)
+ if (__this_cpu_read(hrtimer_interrupts_saved) == hrint)
return 1;
- __get_cpu_var(hrtimer_interrupts_saved) = hrint;
+ __this_cpu_write(hrtimer_interrupts_saved, hrint);
return 0;
}
#endif
@@ -205,8 +205,8 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
/* Ensure the watchdog never gets throttled */
event->hw.interrupts = 0;
- if (__get_cpu_var(watchdog_nmi_touch) == true) {
- __get_cpu_var(watchdog_nmi_touch) = false;
+ if (__this_cpu_read(watchdog_nmi_touch) == true) {
+ __this_cpu_write(watchdog_nmi_touch, false);
return;
}
@@ -220,7 +220,7 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
int this_cpu = smp_processor_id();
/* only print hardlockups once */
- if (__get_cpu_var(hard_watchdog_warn) == true)
+ if (__this_cpu_read(hard_watchdog_warn) == true)
return;
if (hardlockup_panic)
@@ -228,16 +228,16 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
else
WARN(1, "Watchdog detected hard LOCKUP on cpu %d", this_cpu);
- __get_cpu_var(hard_watchdog_warn) = true;
+ __this_cpu_write(hard_watchdog_warn, true);
return;
}
- __get_cpu_var(hard_watchdog_warn) = false;
+ __this_cpu_write(hard_watchdog_warn, false);
return;
}
static void watchdog_interrupt_count(void)
{
- __get_cpu_var(hrtimer_interrupts)++;
+ __this_cpu_inc(hrtimer_interrupts);
}
#else
static inline void watchdog_interrupt_count(void) { return; }
@@ -246,7 +246,7 @@ static inline void watchdog_interrupt_count(void) { return; }
/* watchdog kicker functions */
static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
{
- unsigned long touch_ts = __get_cpu_var(watchdog_touch_ts);
+ unsigned long touch_ts = __this_cpu_read(watchdog_touch_ts);
struct pt_regs *regs = get_irq_regs();
int duration;
@@ -254,18 +254,18 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
watchdog_interrupt_count();
/* kick the softlockup detector */
- wake_up_process(__get_cpu_var(softlockup_watchdog));
+ wake_up_process(__this_cpu_read(softlockup_watchdog));
/* .. and repeat */
hrtimer_forward_now(hrtimer, ns_to_ktime(get_sample_period()));
if (touch_ts == 0) {
- if (unlikely(__get_cpu_var(softlockup_touch_sync))) {
+ if (unlikely(__this_cpu_read(softlockup_touch_sync))) {
/*
* If the time stamp was touched atomically
* make sure the scheduler tick is up to date.
*/
- __get_cpu_var(softlockup_touch_sync) = false;
+ __this_cpu_write(softlockup_touch_sync, false);
sched_clock_tick();
}
__touch_watchdog();
@@ -281,7 +281,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
duration = is_softlockup(touch_ts);
if (unlikely(duration)) {
/* only warn once */
- if (__get_cpu_var(soft_watchdog_warn) == true)
+ if (__this_cpu_read(soft_watchdog_warn) == true)
return HRTIMER_RESTART;
printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n",
@@ -296,9 +296,9 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
if (softlockup_panic)
panic("softlockup: hung tasks");
- __get_cpu_var(soft_watchdog_warn) = true;
+ __this_cpu_write(soft_watchdog_warn, true);
} else
- __get_cpu_var(soft_watchdog_warn) = false;
+ __this_cpu_write(soft_watchdog_warn, false);
return HRTIMER_RESTART;
}