LXR linux/include/linux/compiler-gcc.h

   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
  26#define inline          inline          __attribute__((always_inline))
  27#define __inline__      __inline__      __attribute__((always_inline))
  28#define __inline        __inline        __attribute__((always_inline))
  29#define __deprecated                    __attribute__((deprecated))
  30#define  noinline                       __attribute__((noinline))
  31#define __attribute_pure__              __attribute__((pure))
  32#define __attribute_const__             __attribute__((__const__))
  33