1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _TOOLS_LINUX_COMPILER_H_ 3#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead." 4#endif 5 6/* 7 * Common definitions for all gcc versions go here. 8 */ 9#ifndef GCC_VERSION 10#define GCC_VERSION (__GNUC__ * 10000 \ 11 + __GNUC_MINOR__ * 100 \ 12 + __GNUC_PATCHLEVEL__) 13#endif 14 15#if __has_attribute(__fallthrough__) 16# define fallthrough __attribute__((__fallthrough__)) 17#else 18# define fallthrough do {} while (0) /* fallthrough */ 19#endif 20 21#if __has_attribute(__error__) 22# define __compiletime_error(message) __attribute__((error(message))) 23#endif 24 25/* &a[0] degrades to a pointer: a different type from an array */ 26#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) 27 28#ifndef __pure 29#define __pure __attribute__((pure)) 30#endif 31#define noinline __attribute__((noinline)) 32#ifndef __packed 33#define __packed __attribute__((packed)) 34#endif 35#ifndef __noreturn 36#define __noreturn __attribute__((noreturn)) 37#endif 38#ifndef __aligned 39#define __aligned(x) __attribute__((aligned(x))) 40#endif 41#define __printf(a, b) __attribute__((format(printf, a, b))) 42#define __scanf(a, b) __attribute__((format(scanf, a, b))) 43