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
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