1 /* Public domain. */ 2 3 #ifndef _LINUX_COMPILER_H 4 #define _LINUX_COMPILER_H 5 6 #include <linux/kconfig.h> 7 #include <sys/atomic.h> /* for READ_ONCE() WRITE_ONCE() */ 8 9 #define unlikely(x) __builtin_expect(!!(x), 0) 10 #define likely(x) __builtin_expect(!!(x), 1) 11 12 #define __force 13 #define __acquires(x) 14 #define __releases(x) 15 #define __always_unused __unused 16 #define __maybe_unused 17 #define __read_mostly 18 #define __iomem 19 #define __must_check 20 #define __init 21 #define __exit 22 #define __deprecated 23 #define __always_inline inline 24 #define noinline __attribute__((noinline)) 25 #define fallthrough do {} while (0) 26 27 #ifndef __user 28 #define __user 29 #endif 30 31 #define barrier() __asm __volatile("" : : : "memory") 32 33 #define __printf(x, y) 34 35 #define uninitialized_var(x) x 36 37 /* The Linux code doesn't meet our usual standards! */ 38 #ifdef __clang__ 39 #pragma clang diagnostic ignored "-Wenum-conversion" 40 #pragma clang diagnostic ignored "-Winitializer-overrides" 41 #pragma clang diagnostic ignored "-Wtautological-compare" 42 #pragma clang diagnostic ignored "-Wunneeded-internal-declaration" 43 #pragma clang diagnostic ignored "-Wunused-const-variable" 44 #pragma clang diagnostic ignored "-Wincompatible-pointer-types-discards-qualifiers" 45 #pragma clang diagnostic ignored "-Wunused-function" 46 #pragma clang diagnostic ignored "-Wunused-variable" 47 #pragma clang diagnostic ignored "-Wparentheses-equality" 48 #pragma clang diagnostic ignored "-Wmissing-braces" 49 #else 50 #pragma GCC diagnostic ignored "-Wformat-zero-length" 51 #endif 52 53 #endif 54