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| author | Thomas Gleixner <tglx@linutronix.de> | 2010-01-29 21:39:07 +0100 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2010-03-11 13:30:16 +0100 |
| commit | 8a03ae2a5baed3df09e5643615bdd853fc142a09 (patch) | |
| tree | f0e46a5479cc3f2e668207df20ce2cef73976dd3 /drivers/block/drbd | |
| parent | Add DocBook documentation for the block tracepoints. (diff) | |
| download | linux-8a03ae2a5baed3df09e5643615bdd853fc142a09.tar.xz linux-8a03ae2a5baed3df09e5643615bdd853fc142a09.zip | |
block: drbd: Convert semaphore to mutex
The bm_change semaphore is semantically a mutex. Convert it to a real
mutex.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Diffstat (limited to 'drivers/block/drbd')
| -rw-r--r-- | drivers/block/drbd/drbd_bitmap.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c index b61057e77882..f58e76581c4b 100644 --- a/drivers/block/drbd/drbd_bitmap.c +++ b/drivers/block/drbd/drbd_bitmap.c @@ -66,7 +66,7 @@ struct drbd_bitmap { size_t bm_words; size_t bm_number_of_pages; sector_t bm_dev_capacity; - struct semaphore bm_change; /* serializes resize operations */ + struct mutex bm_change; /* serializes resize operations */ atomic_t bm_async_io; wait_queue_head_t bm_io_wait; @@ -114,7 +114,7 @@ void drbd_bm_lock(struct drbd_conf *mdev, char *why) return; } - trylock_failed = down_trylock(&b->bm_change); + trylock_failed = !mutex_trylock(&b->bm_change); if (trylock_failed) { dev_warn(DEV, "%s going to '%s' but bitmap already locked for '%s' by %s\n", @@ -125,7 +125,7 @@ void drbd_bm_lock(struct drbd_conf *mdev, char *why) b->bm_task == mdev->receiver.task ? "receiver" : b->bm_task == mdev->asender.task ? "asender" : b->bm_task == mdev->worker.task ? "worker" : "?"); - down(&b->bm_change); + mutex_lock(&b->bm_change); } if (__test_and_set_bit(BM_LOCKED, &b->bm_flags)) dev_err(DEV, "FIXME bitmap already locked in bm_lock\n"); @@ -147,7 +147,7 @@ void drbd_bm_unlock(struct drbd_conf *mdev) b->bm_why = NULL; b->bm_task = NULL; - up(&b->bm_change); + mutex_unlock(&b->bm_change); } /* word offset to long pointer */ @@ -295,7 +295,7 @@ int drbd_bm_init(struct drbd_conf *mdev) if (!b) return -ENOMEM; spin_lock_init(&b->bm_lock); - init_MUTEX(&b->bm_change); + mutex_init(&b->bm_change); init_waitqueue_head(&b->bm_io_wait); mdev->bitmap = b; |