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