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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 <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Christoph Hellwig 2009-05-11 23:35:03 +02:00 • committed by Al Viro
commit ebc1ac1645
11 changed files with 32 additions and 17 deletions
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6
fs/hfsplus/super.c
View file

@ -157,10 +157,12 @@ static void hfsplus_write_super(struct super_block *sb)
struct hfsplus_vh *vhdr = HFSPLUS_SB(sb).s_vhdr;
dprint(DBG_SUPER, "hfsplus_write_super\n");
lock_super(sb);
sb->s_dirt = 0;
if (sb->s_flags & MS_RDONLY)
/* warn? */
return;
goto out;
vhdr->free_blocks = cpu_to_be32(HFSPLUS_SB(sb).free_blocks);
vhdr->next_alloc = cpu_to_be32(HFSPLUS_SB(sb).next_alloc);
@ -192,6 +194,8 @@ static void hfsplus_write_super(struct super_block *sb)
}
HFSPLUS_SB(sb).flags &= ~HFSPLUS_SB_WRITEBACKUP;
}
out:
unlock_super(sb);
}
static void hfsplus_put_super(struct super_block *sb)