linux-kernel - [PATCH 1/2] x86, MCE: Do not taint when handling correctable errors

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Date:	Fri, 15 Apr 2011 10:45:40 +0200
From:	Borislav Petkov <bp@...64.org>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	Prarit Bhargava <prarit@...hat.com>,
	Tony Luck <tony.luck@...el.com>, Russ Anderson <rja@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	EDAC devel <linux-edac@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH 1/2] x86, MCE: Do not taint when handling correctable errors

From: Borislav Petkov <borislav.petkov@....com>

Correctable errors are considered something rather normal on modern
hardware these days. Even more importantly, correctable errors mean
exactly that - they've been corrected by the hardware - and there's no
need to taint the kernel since execution hasn't been compromised so far.

Suggested-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 3385ea2..68e2303 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -590,7 +590,6 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		if (!(flags & MCP_DONTLOG) && !mce_dont_log_ce) {
 			mce_log(&m);
 			atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, &m);
-			add_taint(TAINT_MACHINE_CHECK);
 		}
 
 		/*
-- 
1.7.4.rc2

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