Messages in this thread Patch in this message | | | From | Qiaowei Ren <> | Subject | [PATCH v6 03/10] x86, mpx: add macro cpu_has_mpx | Date | Wed, 18 Jun 2014 17:44:09 +0800 |
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In order to do performance optimization, this patch adds macro cpu_has_mpx which will directly return 0 when MPX is not supported by kernel.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com> --- arch/x86/include/asm/cpufeature.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index e265ff9..f302d08 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -339,6 +339,12 @@ extern const char * const x86_power_flags[32]; #define cpu_has_eager_fpu boot_cpu_has(X86_FEATURE_EAGER_FPU) #define cpu_has_topoext boot_cpu_has(X86_FEATURE_TOPOEXT) +#ifdef CONFIG_X86_INTEL_MPX +#define cpu_has_mpx boot_cpu_has(X86_FEATURE_MPX) +#else +#define cpu_has_mpx 0 +#endif /* CONFIG_X86_INTEL_MPX */ + #ifdef CONFIG_X86_64 #undef cpu_has_vme -- 1.7.1
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