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