[PATCH] convert pm_sem to a mutex

The power management semaphore is only used as mutex, so convert it.

[akpm@osdl.org: fix rotten bug]
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/power/power.h b/kernel/power/power.h
index 3afa5dbe6bc5..eb461b816bf4 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -22,7 +22,9 @@ static inline int pm_suspend_disk(void)
         return -EPERM;
 }
 #endif
-extern struct semaphore pm_sem;
+
+extern struct mutex pm_mutex;
+
 #define power_attr(_name) \
 static struct subsys_attribute _name##_attr = { \
         .attr   = {                             \