137 	struct sym_quehead *blink;	/* Backward pointer */  member
141 	(ptr)->flink = (ptr); (ptr)->blink = (ptr); \
151 	return (head->blink == head) ? NULL : head->blink;  in sym_que_last()
155 	struct sym_quehead * blink,  in __sym_que_add()  argument
158 	flink->blink	= new;  in __sym_que_add()
160 	new->blink	= blink;  in __sym_que_add()
161 	blink->flink	= new;  in __sym_que_add()
164 static __inline void __sym_que_del(struct sym_quehead * blink,  in __sym_que_del()  argument
167 	flink->blink = blink;  in __sym_que_del()
168 	blink->flink = flink;  in __sym_que_del()
182 		struct sym_quehead *last = list->blink;  in sym_que_splice()
185 		first->blink = head;  in sym_que_splice()
189 		at->blink   = last;  in sym_que_splice()
199 #define sym_remque(el)			__sym_que_del((el)->blink, (el)->flink)
214 #define sym_insque_tail(new, head)	__sym_que_add(new, (head)->blink, head)
218 	struct sym_quehead *elem = head->blink;  in sym_remque_tail()
221 		__sym_que_del(elem->blink, head);  in sym_remque_tail()