Revert to eager removal of poll/select knotes

This should prevent a panic that bluhm@ has reported.

diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c
index f52667f..a62f404 100644 (file)
--- a/sys/kern/kern_event.c
+++ b/sys/kern/kern_event.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: kern_event.c,v 1.172 2021/11/13 06:04:02 visa Exp $   */
+/*     $OpenBSD: kern_event.c,v 1.173 2021/11/15 15:48:54 visa Exp $   */
 
 /*-
  * Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon@FreeBSD.org>
@@ -813,6 +813,9 @@ kqpoll_done(unsigned int num)
        KASSERT(p->p_kq_serial + num >= p->p_kq_serial);
 
        p->p_kq_serial += num;
+
+       /* XXX Work around a race condition. */
+       kqueue_purge(p, p->p_kq);
 }
 
 void