ext3: Replace lock/unlock_super() with an explicit lock for the orphan list

Use a separate lock to protect the orphan list, so we can stop
overloading the use of lock_super().

Port of ext4 commit 3b9d4ed26680771295d904a6b83e88e620780893
by Theodore Ts'o <tytso@mit.edu>.

CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 806b8b780add..97dd3828384c 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1928,6 +1928,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
         sb->dq_op = &ext3_quota_operations;
 #endif
         INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
+        mutex_init(&sbi->s_orphan_lock);
 
         sb->s_root = NULL;