From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 2 Oct 2013 09:22:22 +0000 (+0200)
Subject: sched/wait: Collapse __wait_event()
X-Git-Tag: firefly_0821_release~176^2~5035^2~104
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=854267f4384243b19c03a2942e84f06f2beb0952;p=firefly-linux-kernel-4.4.55.git

sched/wait: Collapse __wait_event()

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

Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20131002092528.254863348@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/include/linux/wait.h b/include/linux/wait.h
index 29d0249e03ab..68e3a628e157 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -224,17 +224,8 @@ __out:	;								\
 } while (0)
 
 #define __wait_event(wq, condition) 					\
-do {									\
-	DEFINE_WAIT(__wait);						\
-									\
-	for (;;) {							\
-		prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE);	\
-		if (condition)						\
-			break;						\
-		schedule();						\
-	}								\
-	finish_wait(&wq, &__wait);					\
-} while (0)
+	___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0,		\
+		      ___wait_nop_ret, schedule())
 
 /**
  * wait_event - sleep until a condition gets true