diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index cd6b9ee7b69c928118e9bce7c8691651a79a9b52..722befdf8332f6a0fe4bb8ee27023597cb3b2932 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -60,11 +60,6 @@ static inline void iounmap(volatile void __iomem *addr)
 #define __raw_writel	zpci_write_u32
 #define __raw_writeq	zpci_write_u64
 
-#define readb_relaxed	readb
-#define readw_relaxed	readw
-#define readl_relaxed	readl
-#define readq_relaxed	readq
-
 #endif /* CONFIG_PCI */
 
 #include <asm-generic/io.h>