[src/trunk]: src/sys/netinet6 frag6: don't use spin mutex for frag6_lock

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3ed764ff2f35
branches:  trunk
changeset: 371963:3ed764ff2f35
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Fri Oct 21 09:21:17 2022 +0000

description:
frag6: don't use spin mutex for frag6_lock

frag6_lock is held during sending a packet (icmp6_error), so we must
not use a spin mutex because we can acquire sleep locks on sending
a packet.

Also we don't need to use spin mutex for frag6_lock anymore because
frag6_lock is now not used from hardware interrupt context.

diffstat:

 sys/netinet6/frag6.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r ac772a219808 -r 3ed764ff2f35 sys/netinet6/frag6.c
--- a/sys/netinet6/frag6.c      Fri Oct 21 05:51:08 2022 +0000
+++ b/sys/netinet6/frag6.c      Fri Oct 21 09:21:17 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: frag6.c,v 1.75 2019/11/13 02:51:22 ozaki-r Exp $       */
+/*     $NetBSD: frag6.c,v 1.76 2022/10/21 09:21:17 ozaki-r Exp $       */
 /*     $KAME: frag6.c,v 1.40 2002/05/27 21:40:31 itojun Exp $  */
 
 /*
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: frag6.c,v 1.75 2019/11/13 02:51:22 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: frag6.c,v 1.76 2022/10/21 09:21:17 ozaki-r Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -117,7 +117,7 @@
 {
 
        ip6q.ip6q_next = ip6q.ip6q_prev = &ip6q;
-       mutex_init(&frag6_lock, MUTEX_DEFAULT, IPL_NET);
+       mutex_init(&frag6_lock, MUTEX_DEFAULT, IPL_NONE);
 }
 
 /*