diff --git a/include/asm-um/linkage.h b/include/asm-um/linkage.h
new file mode 100644
index 0000000..2701165
--- /dev/null
+++ b/include/asm-um/linkage.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_LINKAGE_H
+#define __ASM_LINKAGE_H
+
+#define FASTCALL(x)	x __attribute__((regparm(3)))
+#define fastcall        __attribute__((regparm(3)))
+
+#endif