72  * FIFOs and Pipes now generate SIGIO for both readers and writers.
424 		!READ_ONCE(pipe->readers);  in pipe_writable()
457 	if (!pipe->readers) {  in pipe_write()
498 		if (!pipe->readers) {  in pipe_write()
571 		 * space. We wake up any readers if necessary, and then  in pipe_write()
700 		if (!pipe->readers)  in pipe_poll()
729 		pipe->readers--;  in pipe_release()
734 	if (!pipe->readers != !pipe->writers) {  in pipe_release()
896 	pipe->readers = pipe->writers = 1;  in get_pipe_inode()
1055  * but that requires that we wake up any other readers/writers
1153 		if (pipe->readers++ == 0)  in fifo_open()
1175 		if (!is_pipe && (filp->f_flags & O_NONBLOCK) && !pipe->readers)  in fifo_open()
1182 		if (!is_pipe && !pipe->readers) {  in fifo_open()
1196 		pipe->readers++;  in fifo_open()
1200 		if (pipe->readers == 1 || pipe->writers == 1)  in fifo_open()
1214 	if (!--pipe->readers)  in fifo_open()