reiserfs: convert j_commit_lock to mutex

j_commit_lock is a semaphore but uses it as if it were a mutex.  This patch
converts it to a mutex.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Edward Shishkin <edward.shishkin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 11 insertions, 13 deletions

diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 3cb4a562030e..c8f60ee183b5 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -34,15 +34,10 @@
 **                      from within kupdate, it will ignore the immediate flag
 */
 
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
 #include <linux/time.h>
 #include <linux/semaphore.h>
-
 #include <linux/vmalloc.h>
 #include <linux/reiserfs_fs.h>
-
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/fcntl.h>
@@ -54,6 +49,9 @@
 #include <linux/writeback.h>
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
+#include <linux/uaccess.h>
+
+#include <asm/system.h>
 
 /* gets a struct reiserfs_journal_list * from a list head */
 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
@@ -1045,9 +1043,9 @@ static int flush_commit_list(struct super_block *s,
         }
 
         /* make sure nobody is trying to flush this one at the same time */
-        down(&jl->j_commit_lock);
+        mutex_lock(&jl->j_commit_mutex);
         if (!journal_list_still_alive(s, trans_id)) {
-                up(&jl->j_commit_lock);
+                mutex_unlock(&jl->j_commit_mutex);
                 goto put_jl;
         }
         BUG_ON(jl->j_trans_id == 0);
@@ -1057,7 +1055,7 @@ static int flush_commit_list(struct super_block *s,
                 if (flushall) {
                         atomic_set(&(jl->j_older_commits_done), 1);
                 }
-                up(&jl->j_commit_lock);
+                mutex_unlock(&jl->j_commit_mutex);
                 goto put_jl;
         }
 
@@ -1181,7 +1179,7 @@ static int flush_commit_list(struct super_block *s,
         if (flushall) {
                 atomic_set(&(jl->j_older_commits_done), 1);
         }
-        up(&jl->j_commit_lock);
+        mutex_unlock(&jl->j_commit_mutex);
       put_jl:
         put_journal_list(s, jl);
 
@@ -2556,7 +2554,7 @@ static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
         INIT_LIST_HEAD(&jl->j_working_list);
         INIT_LIST_HEAD(&jl->j_tail_bh_list);
         INIT_LIST_HEAD(&jl->j_bh_list);
-        sema_init(&jl->j_commit_lock, 1);
+        mutex_init(&jl->j_commit_mutex);
         SB_JOURNAL(s)->j_num_lists++;
         get_journal_list(jl);
         return jl;
@@ -4030,7 +4028,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
          * the new transaction is fully setup, and we've already flushed the
          * ordered bh list
          */
-        down(&jl->j_commit_lock);
+        mutex_lock(&jl->j_commit_mutex);
 
         /* save the transaction id in case we need to commit it later */
         commit_trans_id = jl->j_trans_id;
@@ -4196,7 +4194,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
                 lock_kernel();
         }
         BUG_ON(!list_empty(&jl->j_tail_bh_list));
-        up(&jl->j_commit_lock);
+        mutex_unlock(&jl->j_commit_mutex);
 
         /* honor the flush wishes from the caller, simple commits can
          ** be done outside the journal lock, they are done below
diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h
index c0751724ee64..315517e8bfa1 100644
--- a/include/linux/reiserfs_fs_sb.h
+++ b/include/linux/reiserfs_fs_sb.h
@@ -152,7 +152,7 @@ struct reiserfs_journal_list {
         atomic_t j_nonzerolen;
         atomic_t j_commit_left;
         atomic_t j_older_commits_done;  /* all commits older than this on disk */
-        struct semaphore j_commit_lock;
+        struct mutex j_commit_mutex;
         unsigned long j_trans_id;
         time_t j_timestamp;
         struct reiserfs_list_bitmap *j_list_bitmap;