Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/viro/vfs

Pull vfs pile 2 (of many) from Al Viro:
 "Mostly Miklos' series this time"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  constify dcache.c inlined helpers where possible
  fuse: drop dentry on failed revalidate
  fuse: clean up return in fuse_dentry_revalidate()
  fuse: use d_materialise_unique()
  sysfs: use check_submounts_and_drop()
  nfs: use check_submounts_and_drop()
  gfs2: use check_submounts_and_drop()
  afs: use check_submounts_and_drop()
  vfs: check unlinked ancestors before mount
  vfs: check submounts and drop atomically
  vfs: add d_walk()
  vfs: restructure d_genocide()

fs/afs/dir.c

@@ -685,16 +685,12 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 	spin_unlock(&dentry->d_lock);
 
 out_bad:
-	if (dentry->d_inode) {
-		/* don't unhash if we have submounts */
-		if (have_submounts(dentry))
-			goto out_skip;
-	}
+	/* don't unhash if we have submounts */
+	if (check_submounts_and_drop(dentry) != 0)
+		goto out_skip;
 
 	_debug("dropping dentry %s/%s",
 	       parent->d_name.name, dentry->d_name.name);
-	shrink_dcache_parent(dentry);
-	d_drop(dentry);
 	dput(parent);
 	key_put(key);