1 /* Never include this file directly. Include <linux/compiler.h> instead. */ 2 3 /* 4 * Common definitions for all gcc versions go here. 5 */ 6 7 8 /* Optimization barrier */ 9 /* The "volatile" is due to gcc bugs */ 10 #define barrier() __asm__ __volatile__("": : :"memory") 11 12 /* This macro obfuscates arithmetic on a variable address so that gcc 13 shouldn't recognize the original var, and make assumptions about it */ 14 /* 15 * Versions of the ppc64 compiler before 4.1 had a bug where use of 16 * RELOC_HIDE could trash r30. The bug can be worked around by changing 17 * the inline assembly constraint from =g to =r, in this particular 18 * case either is valid. 19 */ 20 #define RELOC_HIDE(ptr, off) \ 21 ({ unsigned long __ptr; \ 22 __asm__ ("" : "=r"(__ptr) : "0"(ptr)); \ 23 (typeof(ptr)) (__ptr + (off)); }) 24 25 /* &a[0] degrades to a pointer: a different type from an array */ 26 #define __must_be_array(a) \ 27 BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0]))) 28 29 #define inline inline __attribute__((always_inline)) 30 #define __inline__ __inline__ __attribute__((always_inline)) 31 #define __inline __inline __attribute__((always_inline)) 32 #define __deprecated __attribute__((deprecated)) 33 #define __packed __attribute__((packed)) 34 #define __weak __attribute__((weak)) 35 #define __naked __attribute__((naked)) 36 #define __noreturn __attribute__((noreturn)) 37 #define __pure __attribute__((pure)) 38 #define __aligned(x) __attribute__((aligned(x))) 39 #define __printf(a,b) __attribute__((format(printf,a,b))) 40 #define noinline __attribute__((noinline)) 41 #define __attribute_pure__ __attribute__((pure)) 42 #define __attribute_const__ __attribute__((__const__)) 43 #define __maybe_unused __attribute__((unused)) 44