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x86, fpu: Use static_cpu_has() to implement use_xsave()

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use_xsave() is now just a special case of static_cpu_has(), so use
static_cpu_has().

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1273135546-29690-2-git-send-email-avi@redhat.com>
This commit is contained in:
H. Peter Anvin
2010-05-11 17:49:54 -07:00
parent a3c8acd043
commit c9775b4cc5
1 changed files with 3 additions and 9 deletions
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12
arch/x86/include/asm/i387.h
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@@ -18,6 +18,7 @@
#include <linux/hardirq.h> #include <linux/hardirq.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <asm/asm.h> #include <asm/asm.h>
#include <asm/cpufeature.h>
#include <asm/processor.h> #include <asm/processor.h>
#include <asm/sigcontext.h> #include <asm/sigcontext.h>
#include <asm/user.h> #include <asm/user.h>
@@ -57,16 +58,9 @@ extern int restore_i387_xstate_ia32(void __user *buf);
#define X87_FSW_ES (1 << 7) /* Exception Summary */ #define X87_FSW_ES (1 << 7) /* Exception Summary */
static inline bool use_xsave(void) static __always_inline __pure bool use_xsave(void)
{ {
u8 has_xsave; return static_cpu_has(X86_FEATURE_XSAVE);
alternative_io("mov $0, %0",
"mov $1, %0",
X86_FEATURE_XSAVE,
"=qm" (has_xsave));
return has_xsave;
} }
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64