Replace selwakeup() with KNOTE() in pipe event activation.

Recommit the reverted change selectively so that only pipes are
affected. Leave sockets untouched for now.

diff --git a/sys/kern/sys_pipe.c b/sys/kern/sys_pipe.c
index ada1e55..bd61f83 100644 (file)
--- a/sys/kern/sys_pipe.c
+++ b/sys/kern/sys_pipe.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: sys_pipe.c,v 1.138 2022/05/09 14:49:55 visa Exp $     */
+/*     $OpenBSD: sys_pipe.c,v 1.139 2022/05/30 14:06:16 visa Exp $     */
 
 /*
  * Copyright (c) 1996 John S. Dyson
@@ -374,12 +374,7 @@ pipeselwakeup(struct pipe *cpipe)
 {
        rw_assert_wrlock(cpipe->pipe_lock);
 
-       if (cpipe->pipe_state & PIPE_SEL) {
-               cpipe->pipe_state &= ~PIPE_SEL;
-               selwakeup(&cpipe->pipe_sel);
-       } else {
-               KNOTE(&cpipe->pipe_sel.si_note, 0);
-       }
+       KNOTE(&cpipe->pipe_sel.si_note, 0);
 
        if (cpipe->pipe_state & PIPE_ASYNC)
                pgsigio(&cpipe->pipe_sigio, SIGIO, 0);