ext2_sync_super
extern void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
ext2_sync_super(sb, EXT2_SB(sb)->s_es, 1);
ext2_sync_super(sb, es, wait);
ext2_sync_super(sb, sbi->s_es, 1);
ext2_sync_super(sb, es, 1);
ext2_sync_super(sb, es, 1);
ext2_sync_super(sb, es, 1);