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| author | Oleg Nesterov <oleg@redhat.com> | 2013-10-07 20:31:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-16 14:22:17 +0200 |
| commit | 8922915b38cd8b72f8e5af614b95be71d1d299d4 (patch) | |
| tree | d0770b40ff4d01aaaf050a651c717337b237294e /include/linux/wait.h | |
| parent | 6acce3ef84520537f8a09a12c9ddbe814a584dd2 (diff) | |
| download | lwn-8922915b38cd8b72f8e5af614b95be71d1d299d4.tar.gz lwn-8922915b38cd8b72f8e5af614b95be71d1d299d4.zip | |
sched/wait: Add ___wait_cond_timeout() to wait_event*_timeout() too
Commit 4c663cfc ("wait: fix false timeouts when using
wait_event_timeout()") introduced the additional condition checks
after a timeout but only in the "slow" __wait*() paths.
wait_event_timeout(wq, CONDITION, 0) still returns 0 if CONDITION
is already true and we do not call __wait*().
Now that we have ___wait_cond_timeout() we can use it instead to
ensure that __ret will be properly updated.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20131007183106.GA10973@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/wait.h')
| -rw-r--r-- | include/linux/wait.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h index a2726c7dd244..04c0260bda8f 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -270,7 +270,7 @@ do { \ #define wait_event_timeout(wq, condition, timeout) \ ({ \ long __ret = timeout; \ - if (!(condition)) \ + if (!___wait_cond_timeout(condition)) \ __ret = __wait_event_timeout(wq, condition, timeout); \ __ret; \ }) @@ -328,7 +328,7 @@ do { \ #define wait_event_interruptible_timeout(wq, condition, timeout) \ ({ \ long __ret = timeout; \ - if (!(condition)) \ + if (!___wait_cond_timeout(condition)) \ __ret = __wait_event_interruptible_timeout(wq, \ condition, timeout); \ __ret; \ @@ -769,7 +769,7 @@ do { \ timeout) \ ({ \ long __ret = timeout; \ - if (!(condition)) \ + if (!___wait_cond_timeout(condition)) \ __ret = __wait_event_interruptible_lock_irq_timeout( \ wq, condition, lock, timeout); \ __ret; \ |