SIGEV_MAX_SIZE 250 include/asm-generic/siginfo.h #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \ SIGEV_MAX_SIZE 134 include/linux/compat.h #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)