diff options
| author | Matthias Kaehlcke <matthias.kaehlcke@gmail.com> | 2007-05-23 14:19:41 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-11 16:09:01 -0700 |
| commit | 11048dcf333c414f237bb713c422e68f67b115a3 (patch) | |
| tree | 3a42905f9b946e5614568568c4ee1f8f54f54e86 /drivers/base/power/suspend.c | |
| parent | 9f3f776bd9e3d52f0204db1df0914b50d6a2372e (diff) | |
Power Management: use mutexes instead of semaphores
The Power Management code uses semaphores as mutexes. Use the mutex API
instead of the (binary) semaphores.
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/power/suspend.c')
| -rw-r--r-- | drivers/base/power/suspend.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c index 42d2b86ba76..9d6701cd7f1 100644 --- a/drivers/base/power/suspend.c +++ b/drivers/base/power/suspend.c @@ -108,7 +108,7 @@ int suspend_device(struct device * dev, pm_message_t state) /* * This is called with interrupts off, only a single CPU - * running. We can't do down() on a semaphore (and we don't + * running. We can't acquire a mutex or semaphore (and we don't * need the protection) */ static int suspend_device_late(struct device *dev, pm_message_t state) @@ -153,18 +153,18 @@ int device_suspend(pm_message_t state) int error = 0; might_sleep(); - down(&dpm_sem); - down(&dpm_list_sem); + mutex_lock(&dpm_mtx); + mutex_lock(&dpm_list_mtx); while (!list_empty(&dpm_active) && error == 0) { struct list_head * entry = dpm_active.prev; struct device * dev = to_device(entry); get_device(dev); - up(&dpm_list_sem); + mutex_unlock(&dpm_list_mtx); error = suspend_device(dev, state); - down(&dpm_list_sem); + mutex_lock(&dpm_list_mtx); /* Check if the device got removed */ if (!list_empty(&dev->power.entry)) { @@ -179,11 +179,11 @@ int device_suspend(pm_message_t state) error == -EAGAIN ? " (please convert to suspend_late)" : ""); put_device(dev); } - up(&dpm_list_sem); + mutex_unlock(&dpm_list_mtx); if (error) dpm_resume(); - up(&dpm_sem); + mutex_unlock(&dpm_mtx); return error; } |