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-rw-r--r--include/linux/compiler-gcc.h17
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)); })