linux-kernel - [PATCH] x86: Clean up mwait_play

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Date:	Wed, 13 Apr 2011 18:11:13 +0200
From:	Frank Arnold <farnold@...64.org>
To:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: Clean up mwait_play_dead

From: Frank Arnold <frank.arnold@....com>

Commit 93789b32dbf355e70f18b17a82e8661677a7f7fb introduced
cpuinfo_x86 *c for brevity. It is used to check for the
mwait feature flag. The same can be done with a subsequent
check for clflsh and save us a second per-cpu pointer
dereference.

Signed-off-by: Frank Arnold <frank.arnold@....com>
Acked-by: Borislav Petkov <borislav.petkov@....com>
---
 arch/x86/kernel/smpboot.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index c2871d3..93a0066 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1334,7 +1334,7 @@ static inline void mwait_play_dead(void)
 
 	if (!(cpu_has(c, X86_FEATURE_MWAIT) && mwait_usable(c)))
 		return;
-	if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLSH))
+	if (!cpu_has(c, X86_FEATURE_CLFLSH))
 		return;
 	if (__this_cpu_read(cpu_info.cpuid_level) < CPUID_MWAIT_LEAF)
 		return;
-- 
1.7.3.4

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