2902 struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)  in lock_rename()  argument
2906 	if (p1 == p2) {  in lock_rename()
2907 		inode_lock_nested(p1->d_inode, I_MUTEX_PARENT);  in lock_rename()
2911 	mutex_lock(&p1->d_sb->s_vfs_rename_mutex);  in lock_rename()
2913 	p = d_ancestor(p2, p1);  in lock_rename()
2916 		inode_lock_nested(p1->d_inode, I_MUTEX_CHILD);  in lock_rename()
2920 	p = d_ancestor(p1, p2);  in lock_rename()
2922 		inode_lock_nested(p1->d_inode, I_MUTEX_PARENT);  in lock_rename()
2927 	inode_lock_nested(p1->d_inode, I_MUTEX_PARENT);  in lock_rename()
2933 void unlock_rename(struct dentry *p1, struct dentry *p2)  in unlock_rename()  argument
2935 	inode_unlock(p1->d_inode);  in unlock_rename()
2936 	if (p1 != p2) {  in unlock_rename()
2938 		mutex_unlock(&p1->d_sb->s_vfs_rename_mutex);  in unlock_rename()