2948 struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)  in lock_rename()  argument
2952 	if (p1 == p2) {  in lock_rename()
2953 		inode_lock_nested(p1->d_inode, I_MUTEX_PARENT);  in lock_rename()
2957 	mutex_lock(&p1->d_sb->s_vfs_rename_mutex);  in lock_rename()
2959 	p = d_ancestor(p2, p1);  in lock_rename()
2962 		inode_lock_nested(p1->d_inode, I_MUTEX_CHILD);  in lock_rename()
2966 	p = d_ancestor(p1, p2);  in lock_rename()
2968 		inode_lock_nested(p1->d_inode, I_MUTEX_PARENT);  in lock_rename()
2973 	inode_lock_nested(p1->d_inode, I_MUTEX_PARENT);  in lock_rename()
2979 void unlock_rename(struct dentry *p1, struct dentry *p2)  in unlock_rename()  argument
2981 	inode_unlock(p1->d_inode);  in unlock_rename()
2982 	if (p1 != p2) {  in unlock_rename()
2984 		mutex_unlock(&p1->d_sb->s_vfs_rename_mutex);  in unlock_rename()