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

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Message-ID: <tip-a1dc6852ac5eecdcd3122ae01703183a3e88e979@git.kernel.org>
Date:	Fri, 4 Oct 2013 10:35:17 -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_lock_irq_timeout()

Commit-ID:  a1dc6852ac5eecdcd3122ae01703183a3e88e979
Gitweb:     http://git.kernel.org/tip/a1dc6852ac5eecdcd3122ae01703183a3e88e979
Author:     Peter Zijlstra <peterz@...radead.org>
AuthorDate: Wed, 2 Oct 2013 11:22:29 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 4 Oct 2013 10:16:20 +0200

sched/wait: Collapse __wait_event_interruptible_lock_irq_timeout()

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/20131002092528.759956109@infradead.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/linux/wait.h | 25 ++++++-------------------
 1 file changed, 6 insertions(+), 19 deletions(-)

diff --git a/include/linux/wait.h b/include/linux/wait.h
index a577a85..5d5408b 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -763,25 +763,12 @@ do {									\
 	__ret;								\
 })
 
-#define __wait_event_interruptible_lock_irq_timeout(wq, condition,	\
-						    lock, ret)		\
-do {									\
-	DEFINE_WAIT(__wait);						\
-									\
-	for (;;) {							\
-		prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE);	\
-		if (___wait_cond_timeout(condition, ret))		\
-			break;						\
-		if (signal_pending(current)) {				\
-			ret = -ERESTARTSYS;				\
-			break;						\
-		}							\
-		spin_unlock_irq(&lock);					\
-		ret = schedule_timeout(ret);				\
-		spin_lock_irq(&lock);					\
-	}								\
-	finish_wait(&wq, &__wait);					\
-} while (0)
+#define __wait_event_interruptible_lock_irq_timeout(wq, condition, lock, ret) \
+	___wait_event(wq, ___wait_cond_timeout(condition, ret),		      \
+		      TASK_INTERRUPTIBLE, 0, ret,	      		      \
+		      spin_unlock_irq(&lock);				      \
+		      ret = schedule_timeout(ret);			      \
+		      spin_lock_irq(&lock));
 
 /**
  * wait_event_interruptible_lock_irq_timeout - sleep until a condition gets true or a timeout elapses.
--
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