Commit-ID: 8922915b38cd8b72f8e5af614b95be71d1d299d4
Gitweb: http://git.kernel.org/tip/8922915b38cd8b72f8e5af614b95be71d1d299d4
Author: Oleg Nesterov <o...@redhat.com>
AuthorDate: Mon, 7 Oct 2013 20:31:06 +0200
Committer: Ingo Molnar <mi...@kernel.org>
CommitDate: Wed, 16 Oct 2013 14:22:17 +0200
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 <o...@redhat.com>
Signed-off-by: Peter Zijlstra <pet...@infradead.org>
Link: http://lkml.kernel.org/r/20131007183106.ga10...@redhat.com
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
include/linux/wait.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/wait.h b/include/linux/wait.h
index a2726c7..04c0260 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; \
--
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