linux-kernel - [PATCH for -tip] x86, mce: use round_jiffies() instead round_jiffies

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Message-Id: <20090311100925.A7FA.A69D9226@jp.fujitsu.com>
Date:	Wed, 11 Mar 2009 10:14:26 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	kosaki.motohiro@...fujitsu.com, Andi Kleen <andi@...stfloor.org>,
	"H. Peter Anvin" <hpa@...ux.intel.com>, Ingo Molnar <mingo@...e.hu>
Subject: [PATCH for -tip] x86, mce: use round_jiffies() instead round_jiffies_relative()

Impact: saving power _very_ little

round_jiffies() round up absolute jiffies to full second.
round_jiffies_relative() round up relative jiffies to full second.

The "t->expires" is absolute jiffies. Then, round_jiffies() should be
used instead round_jiffies_relative().


Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/cpu/mcheck/mce_64.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index bfbd532..ca14604 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -639,7 +639,7 @@ static void mce_init_timer(void)
 	if (!next_interval)
 		return;
 	setup_timer(t, mcheck_timer, smp_processor_id());
-	t->expires = round_jiffies_relative(jiffies + next_interval);
+	t->expires = round_jiffies(jiffies + next_interval);
 	add_timer(t);
 }
 
@@ -1110,7 +1110,7 @@ static int __cpuinit mce_cpu_callback(struct notifier_block *nfb,
 		break;
 	case CPU_DOWN_FAILED:
 	case CPU_DOWN_FAILED_FROZEN:
-		t->expires = round_jiffies_relative(jiffies + next_interval);
+		t->expires = round_jiffies(jiffies + next_interval);
 		add_timer_on(t, cpu);
 		smp_call_function_single(cpu, mce_reenable_cpu, &action, 1);
 		break;
-- 
1.6.1.2



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