209 	unsigned int writers = READ_ONCE(pipe->writers);  in pipe_readable()  local
211 	return !pipe_empty(head, tail) || !writers;  in pipe_readable()
324 		if (!pipe->writers)  in pipe_read()
665 		if (!pipe->writers && filp->f_version != pipe->w_counter)  in pipe_poll()
707 		pipe->writers--;  in pipe_release()
710 	if (!pipe->readers != !pipe->writers) {  in pipe_release()
869 	pipe->readers = pipe->writers = 1;  in get_pipe_inode()
1124 		if (!is_pipe && !pipe->writers) {  in fifo_open()
1147 		if (!pipe->writers++)  in fifo_open()
1165 		pipe->writers++;  in fifo_open()
1168 		if (pipe->readers == 1 || pipe->writers == 1)  in fifo_open()
1188 	if (!--pipe->writers)  in fifo_open()