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fat: Kill d_invalidate() in vfat_lookup()

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d_invalidate() for positive dentry doesn't work in some cases
(vfsmount, nfsd, and maybe others). shrink_dcache_parent() by
d_invalidate() is pointless for vfat usage at all.

So, this kills it, and intead of it uses d_move().

To save old behavior, this returns alias simply for directory (don't
change pwd, etc..). the directory lookup shouldn't be important for
performance.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
OGAWA Hirofumi 2008-11-06 12:53:52 -08:00 committed by Linus Torvalds
parent 1b52467243
commit 1c13a243a4
1 changed files with 6 additions and 7 deletions
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13
fs/fat/namei_vfat.c
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@ -745,13 +745,12 @@ static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
*
* Switch to new one for reason of locality if possible.
*/
if (d_invalidate(alias) == 0)
dput(alias);
else {
iput(inode);
unlock_super(sb);
return alias;
}
BUG_ON(d_unhashed(alias));
if (!S_ISDIR(inode->i_mode))
d_move(alias, dentry);
iput(inode);
unlock_super(sb);
return alias;
}
out:
unlock_super(sb);