_HAVE_ARCH_IPV6_CSUM  151 arch/x86/include/asm/checksum_32.h #define _HAVE_ARCH_IPV6_CSUM
_HAVE_ARCH_IPV6_CSUM  177 arch/x86/include/asm/checksum_64.h #define _HAVE_ARCH_IPV6_CSUM 1