dm delay: cleanup

Use setup_timer().
Replace semaphore with mutex.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index eb218266cbf3..6928c136d3c5 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -20,7 +20,7 @@
 
 struct delay_c {
         struct timer_list delay_timer;
-        struct semaphore timer_lock;
+        struct mutex timer_lock;
         struct work_struct flush_expired_bios;
         struct list_head delayed_bios;
         atomic_t may_delay;
@@ -58,12 +58,12 @@ static void handle_delayed_timer(unsigned long data)
 
 static void queue_timeout(struct delay_c *dc, unsigned long expires)
 {
-        down(&dc->timer_lock);
+        mutex_lock(&dc->timer_lock);
 
         if (!timer_pending(&dc->delay_timer) || expires < dc->delay_timer.expires)
                 mod_timer(&dc->delay_timer, expires);
 
-        up(&dc->timer_lock);
+        mutex_unlock(&dc->timer_lock);
 }
 
 static void flush_bios(struct bio *bio)
@@ -193,13 +193,11 @@ out:
                 goto bad;
         }
 
-        init_timer(&dc->delay_timer);
-        dc->delay_timer.function = handle_delayed_timer;
-        dc->delay_timer.data = (unsigned long)dc;
+        setup_timer(&dc->delay_timer, handle_delayed_timer, (unsigned long)dc);
 
         INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
         INIT_LIST_HEAD(&dc->delayed_bios);
-        init_MUTEX(&dc->timer_lock);
+        mutex_init(&dc->timer_lock);
         atomic_set(&dc->may_delay, 1);
 
         ti->private = dc;