[src/trunk]: src/sys/sys Mark the context switch counters volatile (because p...

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details:   https://anonhg.NetBSD.org/src/rev/54c05f645c5a
branches:  trunk
changeset: 846751:54c05f645c5a
user:      ad <ad%NetBSD.org@localhost>
date:      Sat Nov 30 17:45:54 2019 +0000

description:
Mark the context switch counters volatile (because preemption).

diffstat:

 sys/sys/lwp.h |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (20 lines):

diff -r 8873336f4f00 -r 54c05f645c5a sys/sys/lwp.h
--- a/sys/sys/lwp.h     Sat Nov 30 16:23:46 2019 +0000
+++ b/sys/sys/lwp.h     Sat Nov 30 17:45:54 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: lwp.h,v 1.190 2019/11/23 19:42:52 ad Exp $     */
+/*     $NetBSD: lwp.h,v 1.191 2019/11/30 17:45:54 ad Exp $     */
 
 /*
  * Copyright (c) 2001, 2006, 2007, 2008, 2009, 2010, 2019
@@ -112,8 +112,8 @@
        pri_t           l_auxprio;      /* l: max(inherit,protect) priority */
        int             l_protectdepth; /* l: for PTHREAD_PRIO_PROTECT */
        SLIST_HEAD(, turnstile) l_pi_lenders; /* l: ts lending us priority */
-       uint64_t        l_ncsw;         /* l: total context switches */
-       uint64_t        l_nivcsw;       /* l: involuntary context switches */
+       volatile uint64_t l_ncsw;       /* l: total context switches */
+       volatile uint64_t l_nivcsw;     /* l: involuntary context switches */
        u_int           l_cpticks;      /* (: Ticks of CPU time */
        fixpt_t         l_pctcpu;       /* p: %cpu during l_swtime */
        fixpt_t         l_estcpu;       /* l: cpu time for SCHED_4BSD */