HWCAP_ 26 arch/arm/include/asm/cpufeature.h #define __hwcap_feature(x) ilog2(HWCAP_ ## x) HWCAP_ 45 arch/arm64/include/asm/hwcap.h #define __khwcap_feature(x) const_ilog2(HWCAP_ ## x) HWCAP_ 15 arch/mips/include/asm/cpufeature.h #define cpu_feature(x) ilog2(HWCAP_ ## x)