Introduce path_put()

* Add path_put() functions for releasing a reference to the dentry and
  vfsmount of a struct path in the right order

* Switch from path_release(nd) to path_put(&nd->path)

* Rename dput_path() to path_put_conditional()

[akpm@linux-foundation.org: fix cifs]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3711799..13383ba 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3159,7 +3159,7 @@
 		return err;
 	/* Quotafile not on the same filesystem? */
 	if (nd.path.mnt->mnt_sb != sb) {
-		path_release(&nd);
+		path_put(&nd.path);
 		return -EXDEV;
 	}
 	/* Quotafile not of fs root? */
@@ -3167,7 +3167,7 @@
 		printk(KERN_WARNING
 			"EXT4-fs: Quota file not on filesystem root. "
 			"Journalled quota will not work.\n");
-	path_release(&nd);
+	path_put(&nd.path);
 	return vfs_quota_on(sb, type, format_id, path);
 }