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#define GCC_VERSION (__GNUC__ * 10000 \ 10 + __GNUC_MINOR__ * 100 \ 11 + __GNUC_PATCHLEVEL__) 12 13#if GCC_VERSION >= 70000 && !defined(__CHECKER__) 14# define __fallthrough __attribute__ ((fallthrough)) 15#endif 16 17#if GCC_VERSION >= 40300 18# define __compiletime_error(message) __attribute__((error(message))) 19#endif /* GCC_VERSION >= 40300 */ 20 21/* &a[0] degrades to a pointer: a different type from an array */ 22#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) 23 24#define noinline __attribute__((noinline)) 25#ifndef __packed 26#define __packed __attribute__((packed)) 27#endif 28#ifndef __noreturn 29#define __noreturn __attribute__((noreturn)) 30#endif 31#ifndef __aligned 32#define __aligned(x) __attribute__((aligned(x))) 33#endif 34#define __printf(a, b) __attribute__((format(printf, a, b))) 35#define __scanf(a, b) __attribute__((format(scanf, a, b))) 36