186 	unsigned int tail = pipe->tail;  in splice_to_pipe()  local
200 	while (!pipe_full(head, tail, pipe->max_usage)) {  in splice_to_pipe()
233 	unsigned int tail = pipe->tail;  in add_to_pipe()  local
240 	} else if (pipe_full(head, tail, pipe->max_usage)) {  in add_to_pipe()
361 	    pipe_occupancy(pipe->head, pipe->tail) > 1)  in pipe_to_sendpage()
400 	unsigned int tail = pipe->tail;  in splice_from_pipe_feed()  local
404 	while (!pipe_empty(head, tail)) {  in splice_from_pipe_feed()
405 		struct pipe_buffer *buf = &pipe->bufs[tail & mask];  in splice_from_pipe_feed()
432 			tail++;  in splice_from_pipe_feed()
433 			pipe->tail = tail;  in splice_from_pipe_feed()
448 	unsigned int tail = pipe->tail;  in eat_empty_buffer()  local
450 	struct pipe_buffer *buf = &pipe->bufs[tail & mask];  in eat_empty_buffer()
454 		pipe->tail = tail+1;  in eat_empty_buffer()
481 	while (pipe_empty(pipe->head, pipe->tail)) {  in splice_from_pipe_next()
640 		unsigned int head, tail, mask;  in iter_file_splice_write()  local
660 		tail = pipe->tail;  in iter_file_splice_write()
665 		for (n = 0; !pipe_empty(head, tail) && left && n < nbufs; tail++, n++) {  in iter_file_splice_write()
666 			struct pipe_buffer *buf = &pipe->bufs[tail & mask];  in iter_file_splice_write()
695 		tail = pipe->tail;  in iter_file_splice_write()
697 			struct pipe_buffer *buf = &pipe->bufs[tail & mask];  in iter_file_splice_write()
702 				tail++;  in iter_file_splice_write()
703 				pipe->tail = tail;  in iter_file_splice_write()
856 	WARN_ON_ONCE(!pipe_empty(pipe->head, pipe->tail));  in splice_direct_to_actor()
865 			pipe_occupancy(pipe->head, pipe->tail);  in splice_direct_to_actor()
905 	pipe->tail = pipe->head = 0;  in splice_direct_to_actor()
991 		if (!pipe_full(pipe->head, pipe->tail, pipe->max_usage))  in wait_for_space()
1090 			p_space = opipe->max_usage - pipe_occupancy(opipe->head, opipe->tail);  in do_splice()
1364 	if (!pipe_empty(pipe->head, pipe->tail))  in ipipe_prep()
1370 	while (pipe_empty(pipe->head, pipe->tail)) {  in ipipe_prep()
1400 	if (!pipe_full(pipe->head, pipe->tail, pipe->max_usage))  in opipe_prep()
1406 	while (pipe_full(pipe->head, pipe->tail, pipe->max_usage)) {  in opipe_prep()
1458 	i_tail = ipipe->tail;  in splice_pipe_to_pipe()
1474 		o_tail = opipe->tail;  in splice_pipe_to_pipe()
1514 			ipipe->tail = i_tail;  in splice_pipe_to_pipe()
1584 	i_tail = ipipe->tail;  in link_pipe()
1598 		o_tail = opipe->tail;  in link_pipe()