Push BKL down into ->remount_fs()

[xfs, btrfs, capifs, shmem don't need BKL, exempt]

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 04802cc39b18..6832135159b6 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -568,6 +568,7 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
         if (!udf_parse_options(options, &uopt, true))
                 return -EINVAL;
 
+        lock_kernel();
         sbi->s_flags = uopt.flags;
         sbi->s_uid   = uopt.uid;
         sbi->s_gid   = uopt.gid;
@@ -581,13 +582,16 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
                         *flags |= MS_RDONLY;
         }
 
-        if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
+        if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
+                unlock_kernel();
                 return 0;
+        }
         if (*flags & MS_RDONLY)
                 udf_close_lvid(sb);
         else
                 udf_open_lvid(sb);
 
+        unlock_kernel();
         return 0;
 }