dm: convert suspend_lock semaphore to mutex
Replace semaphore with mutex.
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 5f0f559..d16bb5b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -73,7 +73,7 @@
struct mapped_device {
struct rw_semaphore io_lock;
- struct semaphore suspend_lock;
+ struct mutex suspend_lock;
spinlock_t pushback_lock;
rwlock_t map_lock;
atomic_t holders;
@@ -994,7 +994,7 @@
memset(md, 0, sizeof(*md));
init_rwsem(&md->io_lock);
- init_MUTEX(&md->suspend_lock);
+ mutex_init(&md->suspend_lock);
spin_lock_init(&md->pushback_lock);
rwlock_init(&md->map_lock);
atomic_set(&md->holders, 1);
@@ -1282,7 +1282,7 @@
{
int r = -EINVAL;
- down(&md->suspend_lock);
+ mutex_lock(&md->suspend_lock);
/* device must be suspended */
if (!dm_suspended(md))
@@ -1297,7 +1297,7 @@
r = __bind(md, table);
out:
- up(&md->suspend_lock);
+ mutex_unlock(&md->suspend_lock);
return r;
}
@@ -1353,7 +1353,7 @@
int do_lockfs = suspend_flags & DM_SUSPEND_LOCKFS_FLAG ? 1 : 0;
int noflush = suspend_flags & DM_SUSPEND_NOFLUSH_FLAG ? 1 : 0;
- down(&md->suspend_lock);
+ mutex_lock(&md->suspend_lock);
if (dm_suspended(md))
goto out_unlock;
@@ -1475,7 +1475,7 @@
dm_table_put(map);
out_unlock:
- up(&md->suspend_lock);
+ mutex_unlock(&md->suspend_lock);
return r;
}
@@ -1485,7 +1485,7 @@
struct bio *def;
struct dm_table *map = NULL;
- down(&md->suspend_lock);
+ mutex_lock(&md->suspend_lock);
if (!dm_suspended(md))
goto out;
@@ -1521,7 +1521,7 @@
out:
dm_table_put(map);
- up(&md->suspend_lock);
+ mutex_unlock(&md->suspend_lock);
return r;
}