JFS: write_super_lockfs should mark superblock clean

  
LVM and EVMS snapshots of JFS filesystems were not mountable because
write_super_lockfs was not marking the volume as clean.  The volume was
otherwise in a consistent state.

fs/jfs/super.c

@@ -382,6 +382,7 @@ static void jfs_write_super_lockfs(struct super_block *sb)
 	if (!(sb->s_flags & MS_RDONLY)) {
 		txQuiesce(sb);
 		lmLogShutdown(log);
+		updateSuper(sb, FM_CLEAN);
 	}
 }
 
@@ -392,6 +393,7 @@ static void jfs_unlockfs(struct super_block *sb)
 	int rc = 0;
 
 	if (!(sb->s_flags & MS_RDONLY)) {
+		updateSuper(sb, FM_MOUNT);
 		if ((rc = lmLogInit(log)))
 			jfs_err("jfs_unlock failed with return code %d", rc);
 		else