[tip:core/locking] kernel/mutex.c: Fix unused var warning

[tip:core/locking] kernel/mutex.c: Fix unused var warning

[tip-bot for Andrew Morton]

Commit-ID:  0f14452563e342637f9a3a2f036cac7315081b2b
Gitweb:     http://git.kernel.org/tip/0f14452563e342637f9a3a2f036cac7315081b2b
Author:     Andrew Morton <akpm@linux-foundation.org>
AuthorDate: Fri, 14 May 2010 11:13:48 -0700
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 18 May 2010 16:46:03 +0200

kernel/mutex.c: Fix unused var warning

kernel/mutex.c: In function '__mutex_lock_common':
 kernel/mutex.c:148: warning: unused variable 'timeout'

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <201005141841.o4EIfcl0015387@imap1.linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/mutex.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/mutex.c b/kernel/mutex.c
index 7d4626b..b998c6e 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -145,7 +145,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 	struct task_struct *task = current;
 	struct mutex_waiter waiter;
 	unsigned long flags;
-	unsigned long timeout;
+	unsigned long timeout __maybe_unused;
 
 	preempt_disable();
 	mutex_acquire(&lock->dep_map, subclass, 0, ip);