Messages in this thread Patch in this message | | | Date | Thu, 10 Jul 2008 18:13:36 -0700 | From | Jeremy Fitzhardinge <> | Subject | [PATCH 1a/2] x86_64: vdso32 cleanup using feature flags |
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Use the X86_FEATURE_SYSENTER32 to remove hard-coded CPU vendor check.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> --- arch/x86/vdso/vdso32-setup.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-)
=================================================================== --- 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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