diff options
Diffstat (limited to 'include/linux/compiler-gcc.h')
| -rw-r--r-- | include/linux/compiler-gcc.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h new file mode 100644 index 000000000000..152734055403 --- /dev/null +++ b/include/linux/compiler-gcc.h @@ -0,0 +1,17 @@ +/* Never include this file directly. Include <linux/compiler.h> instead. */ + +/* + * Common definitions for all gcc versions go here. + */ + + +/* Optimization barrier */ +/* The "volatile" is due to gcc bugs */ +#define barrier() __asm__ __volatile__("": : :"memory") + +/* This macro obfuscates arithmetic on a variable address so that gcc + shouldn't recognize the original var, and make assumptions about it */ +#define RELOC_HIDE(ptr, off) \ + ({ unsigned long __ptr; \ + __asm__ ("" : "=g"(__ptr) : "0"(ptr)); \ + (typeof(ptr)) (__ptr + (off)); }) |