[DLM] Convert a semaphore to a completion

Convert a semaphore into a completion in device.c.

Cc: David Teigland <teigland@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 8 insertions, 10 deletions

diff --git a/fs/dlm/device.c b/fs/dlm/device.c
index 99d8b6b07fba..5da4b2ed988d 100644
--- a/fs/dlm/device.c
+++ b/fs/dlm/device.c
@@ -79,7 +79,7 @@ struct lock_info {
         struct list_head li_ownerqueue;
         struct file_info *li_file;
         struct dlm_lksb __user *li_user_lksb;
-        struct semaphore li_firstlock;
+        struct completion li_firstcomp;
 };
 
 /* A queued AST no less */
@@ -376,8 +376,7 @@ static void ast_routine(void *param)
                     li->li_lksb.sb_status != 0) {
 
                         /* Wait till dlm_lock() has finished */
-                        down(&li->li_firstlock);
-                        up(&li->li_firstlock);
+                        wait_for_completion(&li->li_firstcomp);
 
                         spin_lock(&li->li_file->fi_li_lock);
                         list_del(&li->li_ownerqueue);
@@ -808,10 +807,10 @@ static int do_user_lock(struct file_info *fi, uint8_t cmd,
                         li->li_castaddr  = kparams->castaddr;
                         li->li_castparam = kparams->castparam;
 
-                        /* OK, this isn;t exactly a FIRSTLOCK but it is the
+                        /* OK, this isn't exactly a FIRSTLOCK but it is the
                            first time we've used this lockinfo, and if things
                            fail we want rid of it */
-                        init_MUTEX_LOCKED(&li->li_firstlock);
+                        init_completion(&li->li_firstcomp);
                         set_bit(LI_FLAG_FIRSTLOCK, &li->li_flags);
                         add_lockinfo(li);
 
@@ -839,10 +838,10 @@ static int do_user_lock(struct file_info *fi, uint8_t cmd,
                 if (!li)
                         return -ENOMEM;
 
-                /* semaphore to allow us to complete our work before
+                /* Allow us to complete our work before
                    the AST routine runs. In fact we only need (and use) this
                    when the initial lock fails */
-                init_MUTEX_LOCKED(&li->li_firstlock);
+                init_completion(&li->li_firstcomp);
                 set_bit(LI_FLAG_FIRSTLOCK, &li->li_flags);
         }
 
@@ -892,7 +891,7 @@ static int do_user_lock(struct file_info *fi, uint8_t cmd,
                 if (add_lockinfo(li))
                         printk(KERN_WARNING "Add lockinfo failed\n");
 
-                up(&li->li_firstlock);
+                complete(&li->li_firstcomp);
         }
 
         /* Return the lockid as the user needs it /now/ */
@@ -936,8 +935,7 @@ static int do_user_unlock(struct file_info *fi, uint8_t cmd,
 
         /* Wait until dlm_lock() has completed */
         if (!test_bit(LI_FLAG_ONLIST, &li->li_flags)) {
-                down(&li->li_firstlock);
-                up(&li->li_firstlock);
+                wait_for_completion(&li->li_firstcomp);
         }
 
         /* dlm_unlock() passes a 0 for castaddr which means don't overwrite