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| author | Thomas Gleixner <tglx@linutronix.de> | 2011-12-01 00:04:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-03-01 10:28:04 +0100 |
| commit | 63b2001169e75cd71e917ec953fdab572e3f944a (patch) | |
| tree | 3338725751540571a7d490b252f1b450554a6847 /kernel/sched | |
| parent | sched/rt: Document scheduler related skip-resched-check sites (diff) | |
| download | linux-63b2001169e75cd71e917ec953fdab572e3f944a.tar.xz linux-63b2001169e75cd71e917ec953fdab572e3f944a.zip | |
sched/wait: Add __wake_up_all_locked() API
For code which protects the waitqueue itself with another lock it
makes no sense to acquire the waitqueue lock for wakeup all. Provide
__wake_up_all_locked().
This is an optimization on the vanilla kernel (to be used by the
PCI code) and an important semantic distinction on -rt.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-ux6m4b8jonb9inx8xafh77ds@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 643cc37fcb23..820f7453fda9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3418,9 +3418,9 @@ EXPORT_SYMBOL(__wake_up); /* * Same as __wake_up but called with the spinlock in wait_queue_head_t held. */ -void __wake_up_locked(wait_queue_head_t *q, unsigned int mode) +void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr) { - __wake_up_common(q, mode, 1, 0, NULL); + __wake_up_common(q, mode, nr, 0, NULL); } EXPORT_SYMBOL_GPL(__wake_up_locked); |