linux-kernel - [tip:sched/core] sched/wait: Collapse __wait_event_interruptible

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Date:	Fri, 4 Oct 2013 10:34:48 -0700
From:	tip-bot for Peter Zijlstra <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, oleg@...hat.com, tglx@...utronix.de
Subject: [tip:sched/core] sched/wait:
  Collapse __wait_event_interruptible_exclusive()

Commit-ID:  48c2521717b39cb6904941ec2847d9775669207a
Gitweb:     http://git.kernel.org/tip/48c2521717b39cb6904941ec2847d9775669207a
Author:     Peter Zijlstra <peterz@...radead.org>
AuthorDate: Wed, 2 Oct 2013 11:22:26 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 4 Oct 2013 10:14:49 +0200

sched/wait: Collapse __wait_event_interruptible_exclusive()

Reduce macro complexity by using the new ___wait_event() helper.
No change in behaviour, identical generated code.

Reviewed-by: Oleg Nesterov <oleg@...hat.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/20131002092528.541716442@infradead.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/linux/wait.h | 22 ++--------------------
 1 file changed, 2 insertions(+), 20 deletions(-)

diff --git a/include/linux/wait.h b/include/linux/wait.h
index a79fb15..c4ab172 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -421,26 +421,8 @@ do {									\
 })
 
 #define __wait_event_interruptible_exclusive(wq, condition, ret)	\
-do {									\
-	__label__ __out;						\
-	DEFINE_WAIT(__wait);						\
-									\
-	for (;;) {							\
-		prepare_to_wait_exclusive(&wq, &__wait,			\
-					TASK_INTERRUPTIBLE);		\
-		if (condition)						\
-			break;						\
-		if (signal_pending(current)) {				\
-			ret = -ERESTARTSYS;				\
-			abort_exclusive_wait(&wq, &__wait, 		\
-				TASK_INTERRUPTIBLE, NULL);		\
-			goto __out;					\
-		}							\
-		schedule();						\
-	}								\
-	finish_wait(&wq, &__wait);					\
-__out:	;								\
-} while (0)
+	___wait_event(wq, condition, TASK_INTERRUPTIBLE, 1, ret,	\
+		      schedule())
 
 #define wait_event_interruptible_exclusive(wq, condition)		\
 ({									\
--
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