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->write_super lock_super pushdown

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Push down lock_super into ->write_super instances and remove it from the
caller.

Following filesystem don't need ->s_lock in ->write_super and are skipped:

 * bfs, nilfs2 - no other uses of s_lock and have internal locks in
	->write_super
 * ext2 - uses BKL in ext2_write_super and has internal calls without s_lock
 * reiserfs - no other uses of s_lock as has reiserfs_write_lock (BKL) in
 	->write_super
 * xfs - no other uses of s_lock and uses internal lock (buffer lock on
	superblock buffer) to serialize ->write_super.  Also xfs_fs_write_super
	is superflous and will go away in the next merge window

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig
2009-05-11 23:35:03 +02:00
committed by Al Viro
parent 01ba687577
commit ebc1ac1645
11 changed files with 32 additions and 17 deletions
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8
fs/hfs/super.c
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@@ -49,11 +49,13 @@ MODULE_LICENSE("GPL");
*/
static void hfs_write_super(struct super_block *sb)
{
lock_super(sb);
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
return;
/* sync everything to the buffers */
hfs_mdb_commit(sb);
if (!(sb->s_flags & MS_RDONLY))
hfs_mdb_commit(sb);
unlock_super(sb);
}
/*