linux-kernel - [PATCH for tip/mce3] x86, mce: fix mce printing

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Message-ID: <4A30AC83.5010708@jp.fujitsu.com>
Date:	Thu, 11 Jun 2009 16:04:35 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	linux-kernel@...r.kernel.org
CC:	Huang Ying <ying.huang@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH for tip/mce3] x86, mce: fix mce printing

This patch does:
 - Add print_mce_head() instead of first flag
 - Make header to be printed always
 - Stop double printing of corrected errors

[ This portion is originate from Huang Ying's patch ]

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |   26 +++++++++++++++-----------
 1 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index d4e7b59..6a3127e 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -180,12 +180,8 @@ void mce_log(struct mce *mce)
 	set_bit(0, &notify_user);
 }
 
-static void print_mce(struct mce *m, int *first)
+static void print_mce(struct mce *m)
 {
-	if (*first) {
-		printk(KERN_EMERG "\n" KERN_EMERG "HARDWARE ERROR\n");
-		*first = 0;
-	}
 	printk(KERN_EMERG
 	       "CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
 	       m->extcpu, m->mcgstatus, m->bank, m->status);
@@ -208,6 +204,11 @@ static void print_mce(struct mce *m, int *first)
 			m->apicid);
 }
 
+static void print_mce_head(void)
+{
+	printk(KERN_EMERG "\n" KERN_EMERG "HARDWARE ERROR\n");
+}
+
 static void print_mce_tail(void)
 {
 	printk(KERN_EMERG "This is not a software problem!\n"
@@ -234,7 +235,6 @@ static void wait_for_panic(void)
 static void mce_panic(char *msg, struct mce *final, char *exp)
 {
 	int i;
-	int first = 1;
 
 	/*
 	 * Make sure only one CPU runs in machine check panic
@@ -245,23 +245,27 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
 
 	bust_spinlocks(1);
 	console_verbose();
+	print_mce_head();
 	/* First print corrected ones that are still unlogged */
 	for (i = 0; i < MCE_LOG_LEN; i++) {
 		struct mce *m = &mcelog.entry[i];
-		if ((m->status & MCI_STATUS_VAL) &&
-			!(m->status & MCI_STATUS_UC))
-			print_mce(m, &first);
+		if (!(m->status & MCI_STATUS_VAL))
+			continue;
+		if (!(m->status & MCI_STATUS_UC))
+			print_mce(m);
 	}
 	/* Now print uncorrected but with the final one last */
 	for (i = 0; i < MCE_LOG_LEN; i++) {
 		struct mce *m = &mcelog.entry[i];
 		if (!(m->status & MCI_STATUS_VAL))
 			continue;
+		if (!(m->status & MCI_STATUS_UC))
+			continue;
 		if (!final || memcmp(m, final, sizeof(struct mce)))
-			print_mce(m, &first);
+			print_mce(m);
 	}
 	if (final)
-		print_mce(final, &first);
+		print_mce(final);
 	if (cpu_missing)
 		printk(KERN_EMERG "Some CPUs didn't answer in synchronization\n");
 	print_mce_tail();
-- 
1.6.3

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