100 static void brb_init(struct bop_ring_buffer *brb)  in brb_init()  argument
102 	brb->begin = 0;  in brb_init()
103 	brb->end = 0;  in brb_init()
106 static bool brb_empty(struct bop_ring_buffer *brb)  in brb_empty()  argument
108 	return brb->begin == brb->end;  in brb_empty()
111 static unsigned brb_next(struct bop_ring_buffer *brb, unsigned old)  in brb_next()  argument
114 	return (r >= (sizeof(brb->bops) / sizeof(*brb->bops))) ? 0 : r;  in brb_next()
117 static int brb_push(struct bop_ring_buffer *brb,  in brb_push()  argument
121 	unsigned next = brb_next(brb, brb->end);  in brb_push()
127 	if (next == brb->begin)  in brb_push()
130 	bop = brb->bops + brb->end;  in brb_push()
134 	brb->end = next;  in brb_push()
139 static int brb_pop(struct bop_ring_buffer *brb, struct block_op *result)  in brb_pop()  argument
143 	if (brb_empty(brb))  in brb_pop()
146 	bop = brb->bops + brb->begin;  in brb_pop()
150 	brb->begin = brb_next(brb, brb->begin);  in brb_pop()