[src/trunk]: src/sys/dev/pci wm(4) use atomic_{load,store}_relaxed for evcnt ...

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

details:   https://anonhg.NetBSD.org/src/rev/83c4a5bd47e5
branches:  trunk
changeset: 952782:83c4a5bd47e5
user:      knakahara <knakahara%NetBSD.org@localhost>
date:      Wed Feb 17 08:10:33 2021 +0000

description:
wm(4) use atomic_{load,store}_relaxed for evcnt 64 bit counter.

ok'ed by msaitoh@n.o.

diffstat:

 sys/dev/pci/if_wm.c |  12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diffs (33 lines):

diff -r 34b8ffa8384c -r 83c4a5bd47e5 sys/dev/pci/if_wm.c
--- a/sys/dev/pci/if_wm.c       Wed Feb 17 08:09:22 2021 +0000
+++ b/sys/dev/pci/if_wm.c       Wed Feb 17 08:10:33 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_wm.c,v 1.697 2020/11/19 02:36:30 msaitoh Exp $      */
+/*     $NetBSD: if_wm.c,v 1.698 2021/02/17 08:10:33 knakahara Exp $    */
 
 /*
  * Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -82,7 +82,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.697 2020/11/19 02:36:30 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.698 2021/02/17 08:10:33 knakahara Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -661,8 +661,12 @@
 } while (/*CONSTCOND*/0)
 
 #ifdef WM_EVENT_COUNTERS
-#define        WM_EVCNT_INCR(ev)       (ev)->ev_count++
-#define        WM_EVCNT_ADD(ev, val)   (ev)->ev_count += (val)
+#define        WM_EVCNT_INCR(ev)                                               \
+       atomic_store_relaxed(&((ev)->ev_count),                         \
+           atomic_load_relaxed(&(ev)->ev_count) + 1)
+#define        WM_EVCNT_ADD(ev, val)                                           \
+       atomic_store_relaxed(&((ev)->ev_count),                         \
+           atomic_load_relaxed(&(ev)->ev_count) + (val))
 
 #define WM_Q_EVCNT_INCR(qname, evname)                 \
        WM_EVCNT_INCR(&(qname)->qname##_ev_##evname)