diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index f94ef42..cb8b663 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -25,7 +25,7 @@ extern struct pci_dev *isa_bridge_pcidev;
 /*
  * has legacy ISA devices ?
  */
-#define arch_has_dev_port()	(isa_bridge_pcidev != NULL)
+#define CONFIG_DEVPORT	(isa_bridge_pcidev != NULL)
 #endif
 
 #include <linux/device.h>
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index e5eedfa..7251a67 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -897,12 +897,6 @@ static int __init chr_dev_init(void)
 		if (!devlist[minor].name)
 			continue;
 
-		/*
-		 * Create /dev/port? 
-		 */
-		if ((minor == DEVPORT_MINOR) && !arch_has_dev_port())
-			continue;
-
 		device_create(mem_class, NULL, MKDEV(MEM_MAJOR, minor),
 			      NULL, devlist[minor].name);
 	}
diff --git a/include/linux/io.h b/include/linux/io.h
index 069e407..7fd2d21 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -67,13 +67,4 @@ int check_signature(const volatile void __iomem *io_addr,
 			const unsigned char *signature, int length);
 void devm_ioremap_release(struct device *dev, void *res);
 
-/*
- * Some systems do not have legacy ISA devices.
- * /dev/port is not a valid interface on these systems.
- * So for those archs, <asm/io.h> should define the following symbol.
- */
-#ifndef arch_has_dev_port
-#define arch_has_dev_port()     (1)
-#endif
-
 #endif /* _LINUX_IO_H */