linux-kernel - [tip:sched/core] sched: Cover the CONFIG_DEBUG_SPINLOCK_SLEEP off-case for __might

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Date:	Sat, 18 Jul 2009 14:21:58 GMT
From:	tip-bot for Frederic Weisbecker <fweisbec@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fweisbec@...il.com, a.p.zijlstra@...llo.nl, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:sched/core] sched: Cover the CONFIG_DEBUG_SPINLOCK_SLEEP off-case for __might_sleep()

Commit-ID:  e09758fae8ccde97e026c704319eaa18d488dc86
Gitweb:     http://git.kernel.org/tip/e09758fae8ccde97e026c704319eaa18d488dc86
Author:     Frederic Weisbecker <fweisbec@...il.com>
AuthorDate: Thu, 16 Jul 2009 15:44:29 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sat, 18 Jul 2009 15:51:41 +0200

sched: Cover the CONFIG_DEBUG_SPINLOCK_SLEEP off-case for __might_sleep()

Cover the off case for __might_sleep(), so that we avoid
#ifdefs in files that make use of it. Especially, this prepares
for the __might_sleep() pull up on cond_resched().

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LKML-Reference: <1247725694-6082-3-git-send-email-fweisbec@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 include/linux/kernel.h |    1 +
 kernel/sched.c         |    3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index d6320a3..b804f69 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -139,6 +139,7 @@ extern int _cond_resched(void);
 # define might_sleep() \
 	do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0)
 #else
+  static inline void __might_sleep(char *file, int line) { }
 # define might_sleep() do { might_resched(); } while (0)
 #endif
 
diff --git a/kernel/sched.c b/kernel/sched.c
index 4d39e96..370a6c3 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6610,9 +6610,8 @@ static inline int should_resched(void)
 
 static void __cond_resched(void)
 {
-#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
 	__might_sleep(__FILE__, __LINE__);
-#endif
+
 	add_preempt_count(PREEMPT_ACTIVE);
 	schedule();
 	sub_preempt_count(PREEMPT_ACTIVE);
--
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