* [tip:x86/urgent] x86, amd, xen: Avoid NULL pointer paravirt references
[not found] <20120530222356.GA28417@andromeda.dapyr.net>
@ 2012-05-30 23:23 ` tip-bot for Konrad Rzeszutek Wilk
0 siblings, 0 replies; only message in thread
From: tip-bot for Konrad Rzeszutek Wilk @ 2012-05-30 23:23 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, konrad, andre.przywara, stable, tglx
Commit-ID: 1ab46fd319bcf1fcd9fb6311727d532b580e4eba
Gitweb: http://git.kernel.org/tip/1ab46fd319bcf1fcd9fb6311727d532b580e4eba
Author: Konrad Rzeszutek Wilk <konrad@darnok.org>
AuthorDate: Wed, 30 May 2012 18:23:56 -0400
Committer: H. Peter Anvin <hpa@zytor.com>
CommitDate: Wed, 30 May 2012 16:15:02 -0700
x86, amd, xen: Avoid NULL pointer paravirt references
Stub out MSR methods that aren't actually needed. This fixes a crash
as Xen Dom0 on AMD Trinity systems. A bigger patch should be added to
remove the paravirt machinery completely for the methods which
apparently have no users!
Reported-by: Andre Przywara <andre.przywara@amd.com>
Link: http://lkml.kernel.org/r/20120530222356.GA28417@andromeda.dapyr.net
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
---
arch/x86/xen/enlighten.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 75f33b2..e74df95 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1116,7 +1116,10 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
.wbinvd = native_wbinvd,
.read_msr = native_read_msr_safe,
+ .rdmsr_regs = native_rdmsr_safe_regs,
.write_msr = xen_write_msr_safe,
+ .wrmsr_regs = native_wrmsr_safe_regs,
+
.read_tsc = native_read_tsc,
.read_pmc = native_read_pmc,
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