_sifields_offset 20 arch/x86/kernel/signal_compat.c int _sifields_offset = offsetof(compat_siginfo_t, _sifields); _sifields_offset 44 arch/x86/kernel/signal_compat.c #define CHECK_CSI_OFFSET(name) BUILD_BUG_ON(_sifields_offset != offsetof(compat_siginfo_t, _sifields.name))