udf: destroy sbi mutex in put_super

Call mutex_destroy() on superblock mutex in udf_put_super()
otherwise mutex debugging code isn't able to detect that
mutex is used after being freed.
(thanks to Jan Kara for complete definition).

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 3ccb2f11fc76..3d35a754293a 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -2300,6 +2300,7 @@ static void udf_put_super(struct super_block *sb)
                 udf_close_lvid(sb);
         brelse(sbi->s_lvid_bh);
         udf_sb_free_partitions(sb);
+        mutex_destroy(&sbi->s_alloc_mutex);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
 }