diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 58321d3f314cffaeb5f6a7404dd9db5fce34de01..e3020f4b17be9a4ea8572768d234ac9301da33f3 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -2,6 +2,10 @@
 # Makefile for USB Host Controller Drivers
 #
 
+ifeq ($(CONFIG_USB_DEBUG),y)
+	EXTRA_CFLAGS		+= -DDEBUG
+endif
+
 obj-$(CONFIG_PCI)		+= pci-quirks.o
 
 obj-$(CONFIG_USB_EHCI_HCD)	+= ehci-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index b5b57e957e5f8b689747f3e4b36c48eb78012947..9dd3d14c64f3cd6c04a4cb908b9a0ae618c81f86 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -17,13 +17,6 @@
  */
 
 #include <linux/config.h>
-
-#ifdef CONFIG_USB_DEBUG
-	#define DEBUG
-#else
-	#undef DEBUG
-#endif
-
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/dmapool.h>
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index bf1d9abc07ac37a87d18a3422aaeb23980e880e5..e3af3ac4416add158cc1f86f97aabfa105b16b2f 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -75,13 +75,6 @@
  */
  
 #include <linux/config.h>
-
-#ifdef CONFIG_USB_DEBUG
-#	define DEBUG
-#else
-#	undef DEBUG
-#endif
-
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/pci.h>
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index e46528c825bfdc5183914a552a202d3c99999bc1..3ef2c0cdf1db2fe26c6235ea3410a36e543be617 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -9,12 +9,6 @@
  */
 
 #include <linux/config.h>
-#ifdef CONFIG_USB_DEBUG
-#define DEBUG
-#else
-#undef DEBUG
-#endif
-
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 5a28e61158925d7b608eb248b3df30cac671a944..3a9cd4607962e0d12c1249d678cb5da74d482919 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -32,13 +32,6 @@
 #undef	PACKET_TRACE
 
 #include <linux/config.h>
-
-#ifdef CONFIG_USB_DEBUG
-#	define DEBUG
-#else
-#	undef DEBUG
-#endif
-
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
diff --git a/drivers/usb/host/sl811_cs.c b/drivers/usb/host/sl811_cs.c
index e73faf831b24bce4c1a0a16a9b017cdaae274f16..5056b7459994d6c891297f8d45f946802aa4fc84 100644
--- a/drivers/usb/host/sl811_cs.c
+++ b/drivers/usb/host/sl811_cs.c
@@ -38,7 +38,7 @@ MODULE_LICENSE("GPL");
 /* MACROS                                                             */
 /*====================================================================*/
 
-#if defined(DEBUG) || defined(CONFIG_USB_DEBUG) || defined(PCMCIA_DEBUG)
+#if defined(DEBUG) || defined(PCMCIA_DEBUG)
 
 static int pc_debug = 0;
 module_param(pc_debug, int, 0644);
@@ -129,7 +129,8 @@ static int sl811_hc_init(struct device *parent, ioaddr_t base_addr, int irq)
 	resources[2].end   = base_addr + 1;
 
 	/* The driver core will probe for us.  We know sl811-hcd has been
-	 * initialized already because of the link order dependency.
+	 * initialized already because of the link order dependency created
+	 * by referencing "sl811h_driver".
 	 */
 	platform_dev.name = sl811h_driver.name;
 	return platform_device_register(&platform_dev);
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 5589d4010e36cdc73c3870817f7bc6299af879d9..1c0394cb3c89214d6d6b099f0ffe1a467db15876 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -23,11 +23,6 @@
  */
 
 #include <linux/config.h>
-#ifdef CONFIG_USB_DEBUG
-#define DEBUG
-#else
-#undef DEBUG
-#endif
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/kernel.h>