[src/trunk]: src/sys/arch/aarch64/aarch64 Use the correct (more relaxed) memb...

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

details:   https://anonhg.NetBSD.org/src/rev/1b7ab706bca3
branches:  trunk
changeset: 956125:1b7ab706bca3
user:      skrll <skrll%NetBSD.org@localhost>
date:      Thu Oct 22 07:36:02 2020 +0000

description:
Use the correct (more relaxed) membar_exit barrier in cpu_switchto_softint

diffstat:

 sys/arch/aarch64/aarch64/cpuswitch.S |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r e40c9b9775be -r 1b7ab706bca3 sys/arch/aarch64/aarch64/cpuswitch.S
--- a/sys/arch/aarch64/aarch64/cpuswitch.S      Thu Oct 22 07:34:18 2020 +0000
+++ b/sys/arch/aarch64/aarch64/cpuswitch.S      Thu Oct 22 07:36:02 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpuswitch.S,v 1.30 2020/10/13 21:24:22 skrll Exp $ */
+/* $NetBSD: cpuswitch.S,v 1.31 2020/10/22 07:36:02 skrll Exp $ */
 
 /*-
  * Copyright (c) 2014, 2020 The NetBSD Foundation, Inc.
@@ -38,7 +38,7 @@
 #include "opt_ddb.h"
 #include "opt_kasan.h"
 
-RCSID("$NetBSD: cpuswitch.S,v 1.30 2020/10/13 21:24:22 skrll Exp $")
+RCSID("$NetBSD: cpuswitch.S,v 1.31 2020/10/22 07:36:02 skrll Exp $")
 
        ARMV8_DEFINE_OPTIONS
 
@@ -219,7 +219,7 @@
        msr     tpidr_el1, x19          /* curlwp = pinned_lwp */
        ldr     x3, [x19, #L_CPU]       /* x3 = curlwp->l_cpu */
        str     x19, [x3, #CI_CURLWP]   /* curlwp->l_cpu->ci_curlwp := x19 */
-       dmb     st                      /* see comments in kern_mutex.c */
+       dmb     ishst                   /* see comments in kern_mutex.c */
 
        mov     sp, x4                  /* restore pinned_lwp sp */
        msr     cpacr_el1, x5           /* restore pinned_lwp cpacr */