ISUM 172 arch/alpha/include/asm/core_irongate.h __u64 ISUM; ISUM 76 arch/alpha/include/asm/mce.h unsigned long ISUM; ISUM 214 arch/alpha/kernel/err_ev6.c ev6mchk->EXC_ADDR, ev6mchk->IER_CM, ev6mchk->ISUM,