linux-kernel - [PATCH] x86: Don't print number of MCE banks for every CPU

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Message-ID: <adaeip473qt.fsf@cisco.com>
Date:	Thu, 15 Oct 2009 14:21:14 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH] x86: Don't print number of MCE banks for every CPU

The MCE initialization code explicitly says it doesn't handle asymmetric
configurations where different CPUs support different numbers of MCE
banks, and it prints a big warning in that case.  Therefore, printing
the "mce: CPU supports <x> MCE banks" message into the kernel log for
every CPU is pure redundancy that clutters the log significantly for
systems with lots of CPUs.

Signed-off-by: Roland Dreier <rolandd@...co.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index b1598a9..721a77c 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1214,7 +1214,8 @@ static int __cpuinit mce_cap_init(void)
 	rdmsrl(MSR_IA32_MCG_CAP, cap);
 
 	b = cap & MCG_BANKCNT_MASK;
-	printk(KERN_INFO "mce: CPU supports %d MCE banks\n", b);
+	if (!banks)
+		printk(KERN_INFO "mce: CPU supports %d MCE banks\n", b);
 
 	if (b > MAX_NR_BANKS) {
 		printk(KERN_WARNING
--
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