1 #ifndef _TOOLS_LINUX_COMPILER_H_ 2 #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead." 3 #endif 4 5 /* 6 * Common definitions for all gcc versions go here. 7 */ 8 #define GCC_VERSION (__GNUC__ * 10000 \ 9 + __GNUC_MINOR__ * 100 \ 10 + __GNUC_PATCHLEVEL__) 11 12 #if GCC_VERSION >= 70000 && !defined(__CHECKER__) 13 # define __fallthrough __attribute__ ((fallthrough)) 14 #endif 15 16 #if GCC_VERSION >= 40300 17 # define __compiletime_error(message) __attribute__((error(message))) 18 #endif /* GCC_VERSION >= 40300 */ 19 20 /* &a[0] degrades to a pointer: a different type from an array */ 21 #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) 22 23 #define noinline __attribute__((noinline)) 24 #ifndef __packed 25 #define __packed __attribute__((packed)) 26 #endif 27 #ifndef __noreturn 28 #define __noreturn __attribute__((noreturn)) 29 #endif 30 #ifndef __aligned 31 #define __aligned(x) __attribute__((aligned(x))) 32 #endif 33 #define __printf(a, b) __attribute__((format(printf, a, b))) 34 #define __scanf(a, b) __attribute__((format(scanf, a, b))) 35