57 		pipe_index_t tail;  member
67  *	@tail: The point of buffer consumption
68  *	@head_tail: unsigned long union of @head and @tail
95 			pipe_index_t tail;  member
182  * @tail: The pipe ring tail pointer
184 static inline unsigned int pipe_occupancy(unsigned int head, unsigned int tail)  in pipe_occupancy()  argument
186 	return (pipe_index_t)(head - tail);  in pipe_occupancy()
192  * @tail: The pipe ring tail pointer
194 static inline bool pipe_empty(unsigned int head, unsigned int tail)  in pipe_empty()  argument
196 	return !pipe_occupancy(head, tail);  in pipe_empty()
202  * @tail: The pipe ring tail pointer
205 static inline bool pipe_full(unsigned int head, unsigned int tail,  in pipe_full()  argument
208 	return pipe_occupancy(head, tail) >= limit;  in pipe_full()
217 	return pipe_full(pipe->head, pipe->tail, pipe->max_usage);  in pipe_is_full()
226 	return pipe_empty(pipe->head, pipe->tail);  in pipe_is_empty()
235 	return pipe_occupancy(pipe->head, pipe->tail);  in pipe_buf_usage()