From b6ad92d4faade38619e89acc509ca1416b81a0bd Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Thu, 10 Jul 2008 18:13:36 -0700
Subject: [PATCH] x86_64: vdso32 cleanup using feature flags
Use the X86_FEATURE_SYSENTER32 to remove hard-coded CPU vendor check.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/vdso/vdso32-setup.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index cf058fecfcee..0bce5429a515 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -203,20 +203,11 @@ static struct page *vdso32_pages[1];
#ifdef CONFIG_X86_64
-static int use_sysenter __read_mostly = -1;
-
-#define vdso32_sysenter() (use_sysenter > 0)
+#define vdso32_sysenter() (boot_cpu_has(X86_FEATURE_SYSENTER32))
/* May not be __init: called during resume */
void syscall32_cpu_init(void)
{
- if (use_sysenter < 0) {
- if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
- use_sysenter = 1;
- if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR)
- use_sysenter = 1;
- }
-
/* Load these always in case some future AMD CPU supports
SYSENTER from compat mode too. */
checking_wrmsrl(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS);
--
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