[PATCHv6 6/9] sysv: do not mark superblock dirty on remount

[Artem Bityutskiy <dedekind1@gmail.com>]

From: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

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>
---
 fs/sysv/inode.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index d4a5380..661bab5 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;
 }
-- 
1.7.0.1