18 	struct list_head *head, **tail = &head;  in merge()  local
23 			*tail = a;  in merge()
24 			tail = &a->next;  in merge()
27 				*tail = b;  in merge()
31 			*tail = b;  in merge()
32 			tail = &b->next;  in merge()
35 				*tail = a;  in merge()
54 	struct list_head *tail = head;  in merge_final()  local
60 			tail->next = a;  in merge_final()
61 			a->prev = tail;  in merge_final()
62 			tail = a;  in merge_final()
67 			tail->next = b;  in merge_final()
68 			b->prev = tail;  in merge_final()
69 			tail = b;  in merge_final()
79 	tail->next = b;  in merge_final()
90 		b->prev = tail;  in merge_final()
91 		tail = b;  in merge_final()
96 	tail->next = head;  in merge_final()
97 	head->prev = tail;  in merge_final()
215 		struct list_head **tail = &pending;  in list_sort()  local
219 			tail = &(*tail)->prev;  in list_sort()
222 			struct list_head *a = *tail, *b = a->prev;  in list_sort()
227 			*tail = a;  in list_sort()