721 	struct mountpoint *mp;  in lookup_mountpoint()  local
723 	hlist_for_each_entry(mp, chain, m_hash) {  in lookup_mountpoint()
724 		if (mp->m_dentry == dentry) {  in lookup_mountpoint()
728 			mp->m_count++;  in lookup_mountpoint()
729 			return mp;  in lookup_mountpoint()
738 	struct mountpoint *mp;  in new_mountpoint()  local
741 	mp = kmalloc(sizeof(struct mountpoint), GFP_KERNEL);  in new_mountpoint()
742 	if (!mp)  in new_mountpoint()
747 		kfree(mp);  in new_mountpoint()
751 	mp->m_dentry = dentry;  in new_mountpoint()
752 	mp->m_count = 1;  in new_mountpoint()
753 	hlist_add_head(&mp->m_hash, chain);  in new_mountpoint()
754 	INIT_HLIST_HEAD(&mp->m_list);  in new_mountpoint()
755 	return mp;  in new_mountpoint()
758 static void put_mountpoint(struct mountpoint *mp)  in put_mountpoint()  argument
760 	if (!--mp->m_count) {  in put_mountpoint()
761 		struct dentry *dentry = mp->m_dentry;  in put_mountpoint()
762 		BUG_ON(!hlist_empty(&mp->m_list));  in put_mountpoint()
766 		hlist_del(&mp->m_hash);  in put_mountpoint()
767 		kfree(mp);  in put_mountpoint()
836 			struct mountpoint *mp,  in mnt_set_mountpoint()  argument
839 	mp->m_count++;  in mnt_set_mountpoint()
841 	child_mnt->mnt_mountpoint = dget(mp->m_dentry);  in mnt_set_mountpoint()
843 	child_mnt->mnt_mp = mp;  in mnt_set_mountpoint()
844 	hlist_add_head(&child_mnt->mnt_mp_list, &mp->m_list);  in mnt_set_mountpoint()
852 			struct mountpoint *mp)  in attach_mnt()  argument
854 	mnt_set_mountpoint(parent, mp, mnt);  in attach_mnt()
855 	hlist_add_head_rcu(&mnt->mnt_hash, m_hash(&parent->mnt, mp->m_dentry));  in attach_mnt()
1545 	struct mountpoint *mp;  in __detach_mounts()  local
1549 	mp = lookup_mountpoint(dentry);  in __detach_mounts()
1550 	if (IS_ERR_OR_NULL(mp))  in __detach_mounts()
1554 	while (!hlist_empty(&mp->m_list)) {  in __detach_mounts()
1555 		mnt = hlist_entry(mp->m_list.first, struct mount, mnt_mp_list);  in __detach_mounts()
1563 	put_mountpoint(mp);  in __detach_mounts()
1953 		struct mountpoint *mp = lookup_mountpoint(dentry);  in lock_mount()  local
1954 		if (!mp)  in lock_mount()
1955 			mp = new_mountpoint(dentry);  in lock_mount()
1956 		if (IS_ERR(mp)) {  in lock_mount()
1959 			return mp;  in lock_mount()
1961 		return mp;  in lock_mount()
1979 static int graft_tree(struct mount *mnt, struct mount *p, struct mountpoint *mp)  in graft_tree()  argument
1984 	if (d_is_dir(mp->m_dentry) !=  in graft_tree()
1988 	return attach_recursive_mnt(mnt, p, mp, NULL);  in graft_tree()
2064 	struct mountpoint *mp;  in do_loopback()  local
2076 	mp = lock_mount(path);  in do_loopback()
2077 	err = PTR_ERR(mp);  in do_loopback()
2078 	if (IS_ERR(mp))  in do_loopback()
2109 	err = graft_tree(mnt, parent, mp);  in do_loopback()
2116 	unlock_mount(mp);  in do_loopback()
2227 	struct mountpoint *mp;  in do_move_mount()  local
2235 	mp = lock_mount(path);  in do_move_mount()
2236 	err = PTR_ERR(mp);  in do_move_mount()
2237 	if (IS_ERR(mp))  in do_move_mount()
2276 	err = attach_recursive_mnt(old, real_mount(path->mnt), mp, &parent_path);  in do_move_mount()
2284 	unlock_mount(mp);  in do_move_mount()
2320 	struct mountpoint *mp;  in do_add_mount()  local
2326 	mp = lock_mount(path);  in do_add_mount()
2327 	if (IS_ERR(mp))  in do_add_mount()
2328 		return PTR_ERR(mp);  in do_add_mount()
2352 	err = graft_tree(newmnt, parent, mp);  in do_add_mount()
2355 	unlock_mount(mp);  in do_add_mount()