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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-22 19:25:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-22 19:25:09 -0800
commit3b5d8510b94a95e493e8c4951ffc3d1cf6a6792d (patch)
tree4493367715c7a15e9057e6c72fa3c3edfd0605ad /kernel/watchdog.c
parentc47f39e3b75e1138823984ad5079547c7a41b726 (diff)
parent41ef8f826692c8f65882bec0a8211bd4d1d2d19a (diff)
downloadlinux-linaro-stable-3b5d8510b94a95e493e8c4951ffc3d1cf6a6792d.tar.gz
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core locking changes from Ingo Molnar: "The biggest change is the rwsem lock-steal improvements, both to the assembly optimized and the spinlock based variants. The other notable change is the clean up of the seqlock implementation to be based on the seqcount infrastructure. The rest is assorted smaller debuggability, cleanup and continued -rt locking changes." * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rwsem-spinlock: Implement writer lock-stealing for better scalability futex: Revert "futex: Mark get_robust_list as deprecated" generic: Use raw local irq variant for generic cmpxchg lockdep: Selftest: convert spinlock to raw spinlock seqlock: Use seqcount infrastructure seqlock: Remove unused functions ntp: Make ntp_lock raw intel_idle: Convert i7300_idle_lock to raw_spinlock locking: Various static lock initializer fixes lockdep: Print more info when MAX_LOCK_DEPTH is exceeded rwsem: Implement writer lock-stealing for better scalability lockdep: Silence warning if CONFIG_LOCKDEP isn't set watchdog: Use local_clock for get_timestamp() lockdep: Rename print_unlock_inbalance_bug() to print_unlock_imbalance_bug() locking/stat: Fix a typo
Diffstat (limited to 'kernel/watchdog.c')
-rw-r--r--kernel/watchdog.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 27689422aa92..4a944676358e 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -113,9 +113,9 @@ static int get_softlockup_thresh(void)
* resolution, and we don't need to waste time with a big divide when
* 2^30ns == 1.074s.
*/
-static unsigned long get_timestamp(int this_cpu)
+static unsigned long get_timestamp(void)
{
- return cpu_clock(this_cpu) >> 30LL; /* 2^30 ~= 10^9 */
+ return local_clock() >> 30LL; /* 2^30 ~= 10^9 */
}
static void set_sample_period(void)
@@ -133,9 +133,7 @@ static void set_sample_period(void)
/* Commands for resetting the watchdog */
static void __touch_watchdog(void)
{
- int this_cpu = smp_processor_id();
-
- __this_cpu_write(watchdog_touch_ts, get_timestamp(this_cpu));
+ __this_cpu_write(watchdog_touch_ts, get_timestamp());
}
void touch_softlockup_watchdog(void)
@@ -196,7 +194,7 @@ static int is_hardlockup(void)
static int is_softlockup(unsigned long touch_ts)
{
- unsigned long now = get_timestamp(smp_processor_id());
+ unsigned long now = get_timestamp();
/* Warn about unreasonable delays: */
if (time_after(now, touch_ts + get_softlockup_thresh()))