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-rw-r--r--include/linux/compiler-gcc2.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc2.h b/include/linux/compiler-gcc2.h
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index 000000000000..5a359153ffd9
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+++ b/include/linux/compiler-gcc2.h
@@ -0,0 +1,24 @@
+/* Never include this file directly. Include <linux/compiler.h> instead. */
+
+/* These definitions are for GCC v2.x. */
+
+/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented
+ a mechanism by which the user can annotate likely branch directions and
+ expect the blocks to be reordered appropriately. Define __builtin_expect
+ to nothing for earlier compilers. */
+#include <linux/compiler-gcc.h>
+
+#if __GNUC_MINOR__ < 96
+# define __builtin_expect(x, expected_value) (x)
+#endif
+
+#define __attribute_used__ __attribute__((__unused__))
+
+/*
+ * The attribute `pure' is not implemented in GCC versions earlier
+ * than 2.96.
+ */
+#if __GNUC_MINOR__ >= 96
+# define __attribute_pure__ __attribute__((pure))
+# define __attribute_const__ __attribute__((__const__))
+#endif