linux-kernel - [PATCH 2/2] x86 mce: use new printk recursion disabling interface

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Date:	Fri, 25 May 2012 15:21:12 +0800
From:	ShuoX Liu <shuox.liu@...el.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Yanmin Zhang <yanmin_zhang@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>, andi@...stfloor.org,
	Tony Luck <tony.luck@...el.com>, Ingo Molnar <mingo@...e.hu>
Subject: [PATCH 2/2] x86 mce: use new printk recursion disabling interface

From: ShuoX Liu <shuox.liu@...el.com>

Disable printk recursion to make sure MCE logs printed out.

Signed-off-by: Yanmin Zhang <yanmin_zhang@...ux.intel.com>
Signed-off-by: ShuoX Liu <shuox.liu@...el.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 2afcbd2..365c35d 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1015,6 +1015,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 	DECLARE_BITMAP(toclear, MAX_NR_BANKS);
 	char *msg = "Unknown";
 
+	printk_recursion_check_disable();
 	atomic_inc(&mce_entry);
 
 	this_cpu_inc(mce_exception_count);
@@ -1144,6 +1145,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 	mce_wrmsrl(MSR_IA32_MCG_STATUS, 0);
 out:
 	atomic_dec(&mce_entry);
+	printk_recursion_check_enable();
 	sync_core();
 }
 EXPORT_SYMBOL_GPL(do_machine_check);
-- 
1.7.1

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