MCE_GET_RECORD_LEN   40 arch/x86/include/uapi/asm/mce.h #define MCE_GET_RECORD_LEN   _IOR('M', 1, int)
MCE_GET_RECORD_LEN  380 include/xen/interface/xen-mca.h #define MCE_GET_RECORD_LEN   _IOR('M', 1, int)