linux-kernel - [PATCH] timer: Add __sched to msleep() and msleep

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Date:	Mon, 11 Nov 2013 17:18:15 +0900
From:	Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
To:	linux-kernel@...r.kernel.org
Cc:	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	yrl.pp-manager.tt@...achi.com
Subject: [PATCH] timer: Add __sched to msleep() and msleep_interruptible()

Add __sched to msleep() and msleep_interruptible() for avoiding to show
these functions in WCHAN. If a driver calls msleep() or msleep_interruptible()
in a lot of places, users cannot understand that the driver might sleep which
functions execute msleep() or msleep_interruptible(). So, by applying this
patch, users can confirm the function calling msleep() or msleep_interruptible()
from WCHAN.

Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
---
 kernel/timer.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/timer.c b/kernel/timer.c
index 6582b82..cc1470f 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1660,7 +1660,7 @@ void __init init_timers(void)
  * msleep - sleep safely even with waitqueue interruptions
  * @msecs: Time in milliseconds to sleep for
  */
-void msleep(unsigned int msecs)
+void __sched msleep(unsigned int msecs)
 {
 	unsigned long timeout = msecs_to_jiffies(msecs) + 1;
 
@@ -1674,7 +1674,7 @@ EXPORT_SYMBOL(msleep);
  * msleep_interruptible - sleep waiting for signals
  * @msecs: Time in milliseconds to sleep for
  */
-unsigned long msleep_interruptible(unsigned int msecs)
+unsigned long __sched msleep_interruptible(unsigned int msecs)
 {
 	unsigned long timeout = msecs_to_jiffies(msecs) + 1;
 

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