linux-kernel - [tip:x86/urgent] x86/alternatives: Fix p6 nops on non-modular kernels

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Message-ID: <tip-cb09cad44f07044d9810f18f6f9a6a6f3771f979@git.kernel.org>
Date:	Wed, 22 Aug 2012 03:21:52 -0700
From:	tip-bot for Avi Kivity <avi@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, alan@...ux.intel.com,
	tracek@...hat.com, hpa@...or.com, mingo@...nel.org,
	anthony@...emonkey.ws, alan@...rguk.ukuu.org.uk,
	mtosatti@...hat.com, tglx@...utronix.de, mjt@....msk.ru,
	hpa@...ux.intel.com, avi@...hat.com, borislav.petkov@....com
Subject: [tip:x86/urgent] x86/alternatives:
  Fix p6 nops on non-modular kernels

Commit-ID:  cb09cad44f07044d9810f18f6f9a6a6f3771f979
Gitweb:     http://git.kernel.org/tip/cb09cad44f07044d9810f18f6f9a6a6f3771f979
Author:     Avi Kivity <avi@...hat.com>
AuthorDate: Wed, 22 Aug 2012 13:03:48 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 22 Aug 2012 12:09:49 +0200

x86/alternatives: Fix p6 nops on non-modular kernels

Probably a leftover from the early days of self-patching, p6nops
are marked __initconst_or_module, which causes them to be
discarded in a non-modular kernel.  If something later triggers
patching, it will overwrite kernel code with garbage.

Reported-by: Tomas Racek <tracek@...hat.com>
Signed-off-by: Avi Kivity <avi@...hat.com>
Cc: Michael Tokarev <mjt@....msk.ru>
Cc: Borislav Petkov <borislav.petkov@....com>
Cc: Marcelo Tosatti <mtosatti@...hat.com>
Cc: qemu-devel@...gnu.org
Cc: Anthony Liguori <anthony@...emonkey.ws>
Cc: H. Peter Anvin <hpa@...ux.intel.com>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
Cc: Alan Cox <alan@...ux.intel.com>
Link: http://lkml.kernel.org/r/5034AE84.90708@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/alternative.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index afb7ff7..ced4534 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -165,7 +165,7 @@ static const unsigned char * const k7_nops[ASM_NOP_MAX+2] =
 #endif
 
 #ifdef P6_NOP1
-static const unsigned char  __initconst_or_module p6nops[] =
+static const unsigned char p6nops[] =
 {
 	P6_NOP1,
 	P6_NOP2,
--
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