MCE_GET_LOG_LEN    41 arch/x86/include/uapi/asm/mce.h #define MCE_GET_LOG_LEN      _IOR('M', 2, int)
MCE_GET_LOG_LEN   381 include/xen/interface/xen-mca.h #define MCE_GET_LOG_LEN      _IOR('M', 2, int)