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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#endif5 6/*7 * Common definitions for all gcc versions go here.8 */9#ifndef GCC_VERSION10#define GCC_VERSION (__GNUC__ * 10000 \11 + __GNUC_MINOR__ * 100 \12 + __GNUC_PATCHLEVEL__)13#endif14 15#if __has_attribute(__fallthrough__)16# define fallthrough __attribute__((__fallthrough__))17#else18# define fallthrough do {} while (0) /* fallthrough */19#endif20 21#if __has_attribute(__error__)22# define __compiletime_error(message) __attribute__((error(message)))23#endif24 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 __pure29#define __pure __attribute__((pure))30#endif31#define noinline __attribute__((noinline))32#ifndef __packed33#define __packed __attribute__((packed))34#endif35#ifndef __noreturn36#define __noreturn __attribute__((noreturn))37#endif38#ifndef __aligned39#define __aligned(x) __attribute__((aligned(x)))40#endif41#define __printf(a, b) __attribute__((format(printf, a, b)))42#define __scanf(a, b) __attribute__((format(scanf, a, b)))43