[src/trunk]: src/sys/kern clang does not like to deref a null pointer unless ...

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

details:   https://anonhg.NetBSD.org/src/rev/2334e6270910
branches:  trunk
changeset: 447479:2334e6270910
user:      tnn <tnn%NetBSD.org@localhost>
date:      Sun Jan 13 00:11:29 2019 +0000

description:
clang does not like to deref a null pointer unless it is qualified volatile

diffstat:

 sys/kern/kern_crashme.c |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (17 lines):

diff -r 3d016a5d8f4e -r 2334e6270910 sys/kern/kern_crashme.c
--- a/sys/kern/kern_crashme.c   Sat Jan 12 22:14:08 2019 +0000
+++ b/sys/kern/kern_crashme.c   Sun Jan 13 00:11:29 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_crashme.c,v 1.1 2019/01/09 04:01:20 mrg Exp $     */
+/*     $NetBSD: kern_crashme.c,v 1.2 2019/01/13 00:11:29 tnn Exp $     */
 
 /*
  * Copyright (c) 2018, 2019 Matthew R. Green
@@ -231,6 +231,6 @@
 crashme_null_deref(int flags)
 {
 
-       *(char *)0 = 0;
+       *(volatile char *)0 = 0;
        return -1;
 }