sysv: do not mark superblock dirty on remount

No need to mark the superblock as dirty in sysv_remount, synchronize
it instead (only if mounting R/O).

I did not find any docs about this file-system, and I have no possibility
to test my changes. Thus, this is untested. I see other issues in sysv,
e.g., why sysv_sync_fs writes only in the FSTYPE_SYSV4 case? However,
it marks its SB bh's dirty for all types, and does not wait for them
ever. With zero docs I'm unable to fix this.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 613a5056e880..de44d067b9e6 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -71,8 +71,8 @@ static int sysv_remount(struct super_block *sb, int *flags, char *data)
         lock_super(sb);
         if (sbi->s_forced_ro)
                 *flags |= MS_RDONLY;
-        if (!(*flags & MS_RDONLY))
-                sb->s_dirt = 1;
+        if (*flags & MS_RDONLY)
+                sysv_write_super(sb);
         unlock_super(sb);
         return 0;
 }