diff -urN linux-2.4.22.org/drivers/usb/host/ehci-hcd.c linux-2.4.22/drivers/usb/host/ehci-hcd.c
--- linux-2.4.22.org/drivers/usb/host/ehci-hcd.c	2003-11-21 19:50:57.000000000 +0100
+++ linux-2.4.22/drivers/usb/host/ehci-hcd.c	2003-11-21 19:59:22.000000000 +0100
@@ -1041,8 +1041,11 @@
 MODULE_AUTHOR (DRIVER_AUTHOR);
 MODULE_LICENSE ("GPL");
 
+extern int disable_all_usb;
 static int __init init (void) 
 {
+	if (disable_all_usb)
+		return -ENODEV;
 	pr_debug ("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
 		hcd_name,
 		sizeof (struct ehci_qh), sizeof (struct ehci_qtd),
diff -urN linux-2.4.22.org/drivers/usb/host/uhci.c linux-2.4.22/drivers/usb/host/uhci.c
--- linux-2.4.22.org/drivers/usb/host/uhci.c	2003-11-21 19:50:57.000000000 +0100
+++ linux-2.4.22/drivers/usb/host/uhci.c	2003-11-21 19:59:22.000000000 +0100
@@ -3099,10 +3099,14 @@
 #endif	/* PM */
 };
 
+extern int disable_all_usb; 
  
 static int __init uhci_hcd_init(void)
 {
 	int retval = -ENOMEM;
+	
+	if (disable_all_usb)
+		return -ENODEV;
 
 	info(DRIVER_DESC " " DRIVER_VERSION);
 
diff -urN linux-2.4.22.org/drivers/usb/host/usb-ohci.c linux-2.4.22/drivers/usb/host/usb-ohci.c
--- linux-2.4.22.org/drivers/usb/host/usb-ohci.c	2003-11-21 19:50:57.000000000 +0100
+++ linux-2.4.22/drivers/usb/host/usb-ohci.c	2003-11-21 19:59:22.000000000 +0100
@@ -2939,9 +2939,12 @@
 
  
 /*-------------------------------------------------------------------------*/
+extern int disable_all_usb;
 
 static int __init ohci_hcd_init (void) 
 {
+	if (disable_all_usb)
+		return -ENODEV;
 	return pci_module_init (&ohci_pci_driver);
 }
 
diff -urN linux-2.4.22.org/drivers/usb/host/usb-uhci.c linux-2.4.22/drivers/usb/host/usb-uhci.c
--- linux-2.4.22.org/drivers/usb/host/usb-uhci.c	2003-11-21 19:50:57.000000000 +0100
+++ linux-2.4.22/drivers/usb/host/usb-uhci.c	2003-11-21 19:59:22.000000000 +0100
@@ -3092,10 +3092,14 @@
 };
 
 /*-------------------------------------------------------------------------*/
+extern int disable_all_usb;
 
 static int __init uhci_hcd_init (void) 
 {
 	int retval;
+	
+	if (disable_all_usb)
+		return -ENODEV;
 
 #ifdef DEBUG_SLAB
 	urb_priv_kmem = kmem_cache_create("urb_priv", sizeof(urb_priv_t), 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
diff -urN linux-2.4.22.org/init/main.c linux-2.4.22/init/main.c
--- linux-2.4.22.org/init/main.c	2003-11-21 19:45:09.000000000 +0100
+++ linux-2.4.22/init/main.c	2003-11-21 19:59:22.000000000 +0100
@@ -138,6 +138,15 @@
 
 __setup("profile=", profile_setup);
 
+int disable_all_usb = 0;
+static int __init no_usb(char * s)
+{
+	disable_all_usb = 1;
+	return 1;
+}
+__setup("nousb", no_usb);
+
+
 static int __init checksetup(char *line)
 {
 	struct kernel_param *p;
diff -urN linux-2.4.22.org/kernel/ksyms.c linux-2.4.22/kernel/ksyms.c
--- linux-2.4.22.org/kernel/ksyms.c	2003-11-21 19:45:09.000000000 +0100
+++ linux-2.4.22/kernel/ksyms.c	2003-11-21 20:00:08.000000000 +0100
@@ -530,6 +530,8 @@
 EXPORT_SYMBOL(seq_release);
 EXPORT_SYMBOL(seq_read);
 EXPORT_SYMBOL(seq_lseek);
+extern int disable_all_usb;
+EXPORT_SYMBOL(disable_all_usb);
 EXPORT_SYMBOL(single_open);
 EXPORT_SYMBOL(single_release);
 EXPORT_SYMBOL(seq_release_private);