[src/trunk]: src/sys/rump/net/lib/libshmif if_shmem(4): Use membar_acquire/re...

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

details:   https://anonhg.NetBSD.org/src/rev/5bad7ef9ff57
branches:  trunk
changeset: 365164:5bad7ef9ff57
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sat Apr 09 23:45:02 2022 +0000

description:
if_shmem(4): Use membar_acquire/release for lock acquire/release.

diffstat:

 sys/rump/net/lib/libshmif/if_shmem.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (36 lines):

diff -r 162759444d7a -r 5bad7ef9ff57 sys/rump/net/lib/libshmif/if_shmem.c
--- a/sys/rump/net/lib/libshmif/if_shmem.c      Sat Apr 09 23:44:54 2022 +0000
+++ b/sys/rump/net/lib/libshmif/if_shmem.c      Sat Apr 09 23:45:02 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_shmem.c,v 1.83 2021/07/14 03:16:06 ozaki-r Exp $    */
+/*     $NetBSD: if_shmem.c,v 1.84 2022/04/09 23:45:02 riastradh Exp $  */
 
 /*
  * Copyright (c) 2009, 2010 Antti Kantee.  All Rights Reserved.
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_shmem.c,v 1.83 2021/07/14 03:16:06 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_shmem.c,v 1.84 2022/04/09 23:45:02 riastradh Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
@@ -144,7 +144,7 @@
                }
                continue;
        }
-       membar_enter();
+       membar_acquire();
 }
 
 static void
@@ -152,7 +152,7 @@
 {
        unsigned int old __diagused;
 
-       membar_exit();
+       membar_release();
        old = atomic_swap_32(&busmem->shm_lock, LOCK_UNLOCKED);
        KASSERT(old == LOCK_LOCKED);
 }