[src/trunk]: src/sys mark vm_reg members as volatile instead of building this...

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

details:   https://anonhg.NetBSD.org/src/rev/2781f572349e
branches:  trunk
changeset: 770533:2781f572349e
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu Oct 20 20:13:54 2011 +0000

description:
mark vm_reg members as volatile instead of building this with -O0

diffstat:

 sys/arch/x86/x86/vmt.c   |  17 +++++++++--------
 sys/modules/vmt/Makefile |   3 +--
 2 files changed, 10 insertions(+), 10 deletions(-)

diffs (49 lines):

diff -r 4370e560bf37 -r 2781f572349e sys/arch/x86/x86/vmt.c
--- a/sys/arch/x86/x86/vmt.c    Thu Oct 20 18:20:30 2011 +0000
+++ b/sys/arch/x86/x86/vmt.c    Thu Oct 20 20:13:54 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: vmt.c,v 1.5 2011/10/18 21:41:25 jmcneill Exp $ */
+/* $NetBSD: vmt.c,v 1.6 2011/10/20 20:13:55 jmcneill Exp $ */
 /* $OpenBSD: vmt.c,v 1.11 2011/01/27 21:29:25 dtucker Exp $ */
 
 /*
@@ -151,14 +151,15 @@
 } __packed;
 
 /* A register frame. */
+/* XXX 'volatile' as a workaround because BACKDOOR_OP is likely broken */
 struct vm_backdoor {
-       union vm_reg eax;
-       union vm_reg ebx;
-       union vm_reg ecx;
-       union vm_reg edx;
-       union vm_reg esi;
-       union vm_reg edi;
-       union vm_reg ebp;
+       volatile union vm_reg eax;
+       volatile union vm_reg ebx;
+       volatile union vm_reg ecx;
+       volatile union vm_reg edx;
+       volatile union vm_reg esi;
+       volatile union vm_reg edi;
+       volatile union vm_reg ebp;
 } __packed;
 
 /* RPC context. */
diff -r 4370e560bf37 -r 2781f572349e sys/modules/vmt/Makefile
--- a/sys/modules/vmt/Makefile  Thu Oct 20 18:20:30 2011 +0000
+++ b/sys/modules/vmt/Makefile  Thu Oct 20 20:13:54 2011 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile,v 1.1 2011/10/17 22:39:23 jmcneill Exp $
+#      $NetBSD: Makefile,v 1.2 2011/10/20 20:13:54 jmcneill Exp $
 
 .include "../Makefile.inc"
 
@@ -7,7 +7,6 @@
 KMOD=  vmt     
 IOCONF=        vmt.ioconf
 SRCS=  vmt.c
-COPTS.vmt.c=   -O0
 
 WARNS= 4