[GFS2] sem -> mutex conversion in locking.c

Convert a semaphore to a mutex in locking.c and also tidy
up one or two loose ends.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

3 files changed, 20 insertions, 22 deletions

diff --git a/fs/gfs2/locking.c b/fs/gfs2/locking.c
index 0f4c50ebcbad..6a78aacb26af 100644
--- a/fs/gfs2/locking.c
+++ b/fs/gfs2/locking.c
@@ -28,7 +28,7 @@ struct lmh_wrapper {
    of them by name at mount time, e.g. lock_nolock, lock_dlm. */
 
 static struct list_head lmh_list;
-static struct semaphore lmh_lock;
+static struct mutex lmh_lock;
 
 /**
  * gfs_register_lockproto - Register a low-level locking protocol
@@ -41,11 +41,11 @@ int gfs_register_lockproto(struct lm_lockops *proto)
 {
         struct lmh_wrapper *lw;
 
-        down(&lmh_lock);
+        mutex_lock(&lmh_lock);
 
         list_for_each_entry(lw, &lmh_list, lw_list) {
                 if (!strcmp(lw->lw_ops->lm_proto_name, proto->lm_proto_name)) {
-                        up(&lmh_lock);
+                        mutex_unlock(&lmh_lock);
                         printk(KERN_INFO "GFS2: protocol %s already exists\n",
                                proto->lm_proto_name);
                         return -EEXIST;
@@ -54,14 +54,14 @@ int gfs_register_lockproto(struct lm_lockops *proto)
 
         lw = kzalloc(sizeof(struct lmh_wrapper), GFP_KERNEL);
         if (!lw) {
-                up(&lmh_lock);
+                mutex_unlock(&lmh_lock);
                 return -ENOMEM;
         }
 
         lw->lw_ops = proto;
         list_add(&lw->lw_list, &lmh_list);
 
-        up(&lmh_lock);
+        mutex_unlock(&lmh_lock);
 
         return 0;
 }
@@ -76,18 +76,18 @@ void gfs_unregister_lockproto(struct lm_lockops *proto)
 {
         struct lmh_wrapper *lw;
 
-        down(&lmh_lock);
+        mutex_lock(&lmh_lock);
 
         list_for_each_entry(lw, &lmh_list, lw_list) {
                 if (!strcmp(lw->lw_ops->lm_proto_name, proto->lm_proto_name)) {
                         list_del(&lw->lw_list);
-                        up(&lmh_lock);
+                        mutex_unlock(&lmh_lock);
                         kfree(lw);
                         return;
                 }
         }
 
-        up(&lmh_lock);
+        mutex_unlock(&lmh_lock);
 
         printk(KERN_WARNING "GFS2: can't unregister lock protocol %s\n",
                proto->lm_proto_name);
@@ -118,7 +118,7 @@ int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
         int error, found;
 
  retry:
-        down(&lmh_lock);
+        mutex_lock(&lmh_lock);
 
         found = 0;
         list_for_each_entry(lw, &lmh_list, lw_list) {
@@ -131,7 +131,7 @@ int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
         if (!found) {
                 if (!try && capable(CAP_SYS_MODULE)) {
                         try = 1;
-                        up(&lmh_lock);
+                        mutex_unlock(&lmh_lock);
                         request_module(proto_name);
                         goto retry;
                 }
@@ -142,7 +142,7 @@ int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
 
         if (!try_module_get(lw->lw_ops->lm_owner)) {
                 try = 0;
-                up(&lmh_lock);
+                mutex_unlock(&lmh_lock);
                 msleep(1000);
                 goto retry;
         }
@@ -152,17 +152,17 @@ int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
         if (error)
                 module_put(lw->lw_ops->lm_owner);
  out:
-        up(&lmh_lock);
+        mutex_unlock(&lmh_lock);
         return error;
 }
 
 void gfs2_unmount_lockproto(struct lm_lockstruct *lockstruct)
 {
-        down(&lmh_lock);
+        mutex_lock(&lmh_lock);
         lockstruct->ls_ops->lm_unmount(lockstruct->ls_lockspace);
         if (lockstruct->ls_ops->lm_owner)
                 module_put(lockstruct->ls_ops->lm_owner);
-        up(&lmh_lock);
+        mutex_unlock(&lmh_lock);
 }
 
 /**
@@ -173,16 +173,16 @@ void gfs2_unmount_lockproto(struct lm_lockstruct *lockstruct)
 
 void gfs2_withdraw_lockproto(struct lm_lockstruct *lockstruct)
 {
-        down(&lmh_lock);
+        mutex_lock(&lmh_lock);
         lockstruct->ls_ops->lm_withdraw(lockstruct->ls_lockspace);
         if (lockstruct->ls_ops->lm_owner)
                 module_put(lockstruct->ls_ops->lm_owner);
-        up(&lmh_lock);
+        mutex_unlock(&lmh_lock);
 }
 
 void __init gfs2_init_lmh(void)
 {
-        init_MUTEX(&lmh_lock);
+        mutex_init(&lmh_lock);
         INIT_LIST_HEAD(&lmh_list);
 }
 
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 9e32e0faaf20..134fc57e21d3 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -587,10 +587,9 @@ void gfs2_log_shutdown(struct gfs2_sbd *sdp)
         log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0);
 
         /* printk(KERN_INFO "sd_log_blks_free %u, sd_jdesc->jd_blocks %u\n", sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); */
-        gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free ==
-                             sdp->sd_jdesc->jd_blocks);
-        gfs2_assert_withdraw(sdp, sdp->sd_log_head == sdp->sd_log_tail);
-        gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail2_list));
+        gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks);
+        gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
+        gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list));
 
         sdp->sd_log_head = sdp->sd_log_flush_head;
         sdp->sd_log_tail = sdp->sd_log_head;
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
index 4532dbab0a2c..c9624c30cad6 100644
--- a/fs/gfs2/util.h
+++ b/fs/gfs2/util.h
@@ -30,7 +30,6 @@ void gfs2_assert_i(struct gfs2_sbd *sdp);
 do { \
         if (unlikely(!(assertion))) { \
                 gfs2_assert_i(sdp); \
-                BUG(); \
         } \
 } while (0)