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Subject[tip:sched/core] sched/wait: Collapse __wait_event()
Commit-ID:  854267f4384243b19c03a2942e84f06f2beb0952
Gitweb: http://git.kernel.org/tip/854267f4384243b19c03a2942e84f06f2beb0952
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Wed, 2 Oct 2013 11:22:22 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Fri, 4 Oct 2013 10:14:46 +0200

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>
---
include/linux/wait.h | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/include/linux/wait.h b/include/linux/wait.h
index 29d0249..68e3a62 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

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