linux-kernel - [PATCH 07/10] x86, xsave: reduce cpu_has

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Date:	Tue, 20 Jul 2010 20:50:54 +0200
From:	Robert Richter <robert.richter@....com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Robert Richter <robert.richter@....com>
Subject: [PATCH 07/10] x86, xsave: reduce cpu_has_xsave checks

This moves the cpu_has_xsave check at the beginning of
xsave_init(). All other checks may removed then.

Signed-off-by: Robert Richter <robert.richter@....com>
---
 arch/x86/kernel/xsave.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c
index a594f49..550bf45 100644
--- a/arch/x86/kernel/xsave.c
+++ b/arch/x86/kernel/xsave.c
@@ -362,9 +362,6 @@ unsigned int sig_xstate_size = sizeof(struct _fpstate);
  */
 static void __cpuinit __xsave_init(void)
 {
-	if (!cpu_has_xsave)
-		return;
-
 	set_in_cr4(X86_CR4_OSXSAVE);
 
 	/*
@@ -433,9 +430,6 @@ static void __cpuinit xsave_cntxt_init(void)
 {
 	unsigned int eax, ebx, ecx, edx;
 
-	if (!cpu_has_xsave)
-		return;
-
 	cpuid_count(0xd, 0, &eax, &ebx, &ecx, &edx);
 	pcntxt_mask = eax + ((u64)edx << 32);
 
@@ -469,6 +463,9 @@ static void __cpuinit xsave_cntxt_init(void)
 
 void __cpuinit xsave_init(void)
 {
+	if (!cpu_has_xsave)
+		return;
+
 	/*
 	 * Boot processor to setup the FP and extended state context info.
 	 */
-- 
1.7.1.1


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