[tip:x86/fpu] x86, fpu: Use static_cpu_has() to implement use_xsave()
in [Kernel]
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From: tip-bot for H. Peter Anvin on 11 May 2010 21:10 Commit-ID: c9775b4cc522e5f1b40b1366a993f0f05f600f39 Gitweb: http://git.kernel.org/tip/c9775b4cc522e5f1b40b1366a993f0f05f600f39 Author: H. Peter Anvin <hpa(a)zytor.com> AuthorDate: Tue, 11 May 2010 17:49:54 -0700 Committer: H. Peter Anvin <hpa(a)zytor.com> CommitDate: Tue, 11 May 2010 17:49:54 -0700 x86, fpu: Use static_cpu_has() to implement use_xsave() use_xsave() is now just a special case of static_cpu_has(), so use static_cpu_has(). Signed-off-by: H. Peter Anvin <hpa(a)zytor.com> Cc: Avi Kivity <avi(a)redhat.com> Cc: Suresh Siddha <suresh.b.siddha(a)intel.com> LKML-Reference: <1273135546-29690-2-git-send-email-avi(a)redhat.com> --- arch/x86/include/asm/i387.h | 12 +++--------- 1 files changed, 3 insertions(+), 9 deletions(-) diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h index 8002e9c..c991b3a 100644 --- a/arch/x86/include/asm/i387.h +++ b/arch/x86/include/asm/i387.h @@ -18,6 +18,7 @@ #include <linux/hardirq.h> #include <linux/slab.h> #include <asm/asm.h> +#include <asm/cpufeature.h> #include <asm/processor.h> #include <asm/sigcontext.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 */ -static inline bool use_xsave(void) +static __always_inline __pure bool use_xsave(void) { - u8 has_xsave; - - alternative_io("mov $0, %0", - "mov $1, %0", - X86_FEATURE_XSAVE, - "=qm" (has_xsave)); - - return has_xsave; + return static_cpu_has(X86_FEATURE_XSAVE); } #ifdef CONFIG_X86_64 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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