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Subject[tip:core/locking] Revert "sched/wait: Suppress Sparse ' variable shadowing' warning"
Commit-ID:  f207dbe63c61158c234e2e8929a3725a7f6b2b9b
Gitweb: http://git.kernel.org/tip/f207dbe63c61158c234e2e8929a3725a7f6b2b9b
Author: Ingo Molnar <mingo@kernel.org>
AuthorDate: Thu, 27 Feb 2014 12:20:31 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 27 Feb 2014 12:20:31 +0100

Revert "sched/wait: Suppress Sparse 'variable shadowing' warning"

This reverts commit 980f88e414418bf65569a3b62b08b07e6fc2f4c6.

This warning is actually useful, don't suppress it.

We actually rely on the shadowing for ___wait_cond_timeout().

We further used the __ret variable in __wait_event_timeout()'s cmd
argument: __ret = schedule_timeout(__ret). That now explicitly uses the
wrong __ret.

Reported-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Requested-by: Andrew Morton <akpm@linux-foundation.org>
Requested-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-Q5blhuqqzwgVwvjf1gszrdol@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@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 c55ea5c..559044c 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -195,7 +195,7 @@ wait_queue_head_t *bit_waitqueue(void *, int);
({ \
__label__ __out; \
wait_queue_t __wait; \
- long ___ret = ret; \
+ long __ret = ret; \
\
INIT_LIST_HEAD(&__wait.task_list); \
if (exclusive) \
@@ -210,7 +210,7 @@ wait_queue_head_t *bit_waitqueue(void *, int);
break; \
\
if (___wait_is_interruptible(state) && __int) { \
- ___ret = __int; \
+ __ret = __int; \
if (exclusive) { \
abort_exclusive_wait(&wq, &__wait, \
state, NULL); \
@@ -222,7 +222,7 @@ wait_queue_head_t *bit_waitqueue(void *, int);
cmd; \
} \
finish_wait(&wq, &__wait); \
-__out: ___ret; \
+__out: __ret; \
})

#define __wait_event(wq, condition) \

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