[src/trunk]: src/sys/kern Also wait interruptibly when exiting. Avoids deadlo...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/18abb6dad260
branches:  trunk
changeset: 828214:18abb6dad260
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Dec 02 22:51:22 2017 +0000

description:
Also wait interruptibly when exiting. Avoids deadlocked on exit processes
create by golang.

diffstat:

 sys/kern/kern_lwp.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (30 lines):

diff -r 215419e4b963 -r 18abb6dad260 sys/kern/kern_lwp.c
--- a/sys/kern/kern_lwp.c       Sat Dec 02 21:04:59 2017 +0000
+++ b/sys/kern/kern_lwp.c       Sat Dec 02 22:51:22 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_lwp.c,v 1.190 2017/06/22 09:05:09 skrll Exp $     */
+/*     $NetBSD: kern_lwp.c,v 1.191 2017/12/02 22:51:22 christos Exp $  */
 
 /*-
  * Copyright (c) 2001, 2006, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -211,7 +211,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.190 2017/06/22 09:05:09 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.191 2017/12/02 22:51:22 christos Exp $");
 
 #include "opt_ddb.h"
 #include "opt_lockdebug.h"
@@ -645,8 +645,9 @@
                 */
                if (exiting) {
                        KASSERT(p->p_nlwps > 1);
-                       cv_wait(&p->p_lwpcv, p->p_lock);
-                       error = EAGAIN;
+                       error = cv_wait_sig(&p->p_lwpcv, p->p_lock);
+                       if (error == 0)
+                               error = EAGAIN;
                        break;
                }