diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h
index 7db75ebca5a9..6df9743270ec 100644
--- a/arch/sparc/include/asm/io_64.h
+++ b/arch/sparc/include/asm/io_64.h
@@ -9,10 +9,6 @@
 #include <asm/asi.h>
 #include <asm-generic/pci_iomap.h>
 
-/* PC crapola... */
-#define __SLOW_DOWN_IO	do { } while (0)
-#define SLOW_DOWN_IO	do { } while (0)
-
 /* BIO layer definitions. */
 extern unsigned long kern_base, kern_size;