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authorStephen Hemminger <shemminger@osdl.org>2006-12-06 20:34:35 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:28 -0800
commita6d70980602e6f1869ebcdcbfaf55a0a5941583e (patch)
treeb7e9b5f457eb7fe91fbbdbe978a50493da862cf2 /kernel/power/main.c
parent3eb1b3a40722cbb46631db373af66d13d1e7ac81 (diff)
[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>
Diffstat (limited to 'kernel/power/main.c')
-rw-r--r--kernel/power/main.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 6096c71b182..751157b7897 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -25,7 +25,7 @@
/*This is just an arbitrary number */
#define FREE_PAGE_NUMBER (100)
-DECLARE_MUTEX(pm_sem);
+DEFINE_MUTEX(pm_mutex);
struct pm_ops *pm_ops;
suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN;
@@ -37,9 +37,9 @@ suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN;
void pm_set_ops(struct pm_ops * ops)
{
- down(&pm_sem);
+ mutex_lock(&pm_mutex);
pm_ops = ops;
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
}
@@ -183,7 +183,7 @@ static int enter_state(suspend_state_t state)
if (!valid_state(state))
return -ENODEV;
- if (down_trylock(&pm_sem))
+ if (!mutex_trylock(&pm_mutex))
return -EBUSY;
if (state == PM_SUSPEND_DISK) {
@@ -201,7 +201,7 @@ static int enter_state(suspend_state_t state)
pr_debug("PM: Finishing wakeup.\n");
suspend_finish(state);
Unlock:
- up(&pm_sem);
+ mutex_unlock(&pm_mutex);
return error;
}