include/linux/compiler-gcc.h at v2.6.13 · tjh.dev/kernel

tjh.dev / kernel

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

kernel / include / linux / compiler-gcc.h

at v2.6.13 17 lines 559 B view raw

 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#define RELOC_HIDE(ptr, off)					\
15  ({ unsigned long __ptr;					\
16    __asm__ ("" : "=g"(__ptr) : "0"(ptr));		\
17    (typeof(ptr)) (__ptr + (off)); })