switch path_mountpoint() to struct filename

 * Returns 0 and "path" will be valid on success; Returns error otherwise.

 */

static int

path_mountpoint(int dfd, const char *name, struct path *path, unsigned int flags)

path_mountpoint(int dfd, const struct filename *name, struct path *path,

		unsigned int flags)

{

	struct nameidata nd;

	int err;

	err = path_init(dfd, name, flags, &nd);

	err = path_init(dfd, name->name, flags, &nd);

	if (unlikely(err))

		goto out;

}

static int

filename_mountpoint(int dfd, struct filename *s, struct path *path,

filename_mountpoint(int dfd, struct filename *name, struct path *path,

			unsigned int flags)

{

	int error;

	if (IS_ERR(s))

		return PTR_ERR(s);

	error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_RCU);

	if (IS_ERR(name))

		return PTR_ERR(name);

	error = path_mountpoint(dfd, name, path, flags | LOOKUP_RCU);

	if (unlikely(error == -ECHILD))

		error = path_mountpoint(dfd, s->name, path, flags);

		error = path_mountpoint(dfd, name, path, flags);

	if (unlikely(error == -ESTALE))

		error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_REVAL);

		error = path_mountpoint(dfd, name, path, flags | LOOKUP_REVAL);

	if (likely(!error))

		audit_inode(s, path->dentry, 0);

	putname(s);

		audit_inode(name, path->dentry, 0);

	putname(name);

	return error;

}