2730 static void swap_names(struct dentry *dentry, struct dentry *target)  in swap_names()  argument
2732 	if (unlikely(dname_external(target))) {  in swap_names()
2737 			swap(target->d_name.name, dentry->d_name.name);  in swap_names()
2743 			memcpy(target->d_iname, dentry->d_name.name,  in swap_names()
2745 			dentry->d_name.name = target->d_name.name;  in swap_names()
2746 			target->d_name.name = target->d_iname;  in swap_names()
2754 			memcpy(dentry->d_iname, target->d_name.name,  in swap_names()
2755 					target->d_name.len + 1);  in swap_names()
2756 			target->d_name.name = dentry->d_name.name;  in swap_names()
2766 				     ((long *) &target->d_iname)[i]);  in swap_names()
2770 	swap(dentry->d_name.hash_len, target->d_name.hash_len);  in swap_names()
2773 static void copy_name(struct dentry *dentry, struct dentry *target)  in copy_name()  argument
2778 	if (unlikely(dname_external(target))) {  in copy_name()
2779 		atomic_inc(&external_name(target)->u.count);  in copy_name()
2780 		dentry->d_name = target->d_name;  in copy_name()
2782 		memcpy(dentry->d_iname, target->d_name.name,  in copy_name()
2783 				target->d_name.len + 1);  in copy_name()
2785 		dentry->d_name.hash_len = target->d_name.hash_len;  in copy_name()
2802 static void __d_move(struct dentry *dentry, struct dentry *target,  in __d_move()  argument
2810 	if (WARN_ON(dentry == target))  in __d_move()
2813 	BUG_ON(d_ancestor(target, dentry));  in __d_move()
2815 	p = d_ancestor(old_parent, target);  in __d_move()
2818 		spin_lock(&target->d_parent->d_lock);  in __d_move()
2821 		spin_lock(&target->d_parent->d_lock);  in __d_move()
2826 		if (p != target)  in __d_move()
2827 			spin_lock_nested(&target->d_parent->d_lock,  in __d_move()
2831 	spin_lock_nested(&target->d_lock, 3);  in __d_move()
2833 	if (unlikely(d_in_lookup(target))) {  in __d_move()
2834 		dir = target->d_parent->d_inode;  in __d_move()
2836 		__d_lookup_done(target);  in __d_move()
2840 	write_seqcount_begin_nested(&target->d_seq, DENTRY_D_LOCK_NESTED);  in __d_move()
2845 	if (!d_unhashed(target))  in __d_move()
2846 		___d_drop(target);  in __d_move()
2849 	dentry->d_parent = target->d_parent;  in __d_move()
2851 		copy_name(dentry, target);  in __d_move()
2852 		target->d_hash.pprev = NULL;  in __d_move()
2857 		target->d_parent = old_parent;  in __d_move()
2858 		swap_names(dentry, target);  in __d_move()
2859 		list_move(&target->d_child, &target->d_parent->d_subdirs);  in __d_move()
2860 		__d_rehash(target);  in __d_move()
2861 		fsnotify_update_flags(target);  in __d_move()
2868 	write_seqcount_end(&target->d_seq);  in __d_move()
2878 	spin_unlock(&target->d_lock);  in __d_move()
2891 void d_move(struct dentry *dentry, struct dentry *target)  in d_move()  argument
2894 	__d_move(dentry, target, false);  in d_move()