22 	struct list_head *head, **tail = &head;  in merge()  local
27 			*tail = a;  in merge()
28 			tail = &a->next;  in merge()
31 				*tail = b;  in merge()
35 			*tail = b;  in merge()
36 			tail = &b->next;  in merge()
39 				*tail = a;  in merge()
58 	struct list_head *tail = head;  in merge_final()  local
64 			tail->next = a;  in merge_final()
65 			a->prev = tail;  in merge_final()
66 			tail = a;  in merge_final()
71 			tail->next = b;  in merge_final()
72 			b->prev = tail;  in merge_final()
73 			tail = b;  in merge_final()
83 	tail->next = b;  in merge_final()
94 		b->prev = tail;  in merge_final()
95 		tail = b;  in merge_final()
100 	tail->next = head;  in merge_final()
101 	head->prev = tail;  in merge_final()
221 		struct list_head **tail = &pending;  in list_sort()  local
225 			tail = &(*tail)->prev;  in list_sort()
228 			struct list_head *a = *tail, *b = a->prev;  in list_sort()
233 			*tail = a;  in list_sort()