USB: remove CONFIG_USB_DEVICEFS

This option has been deprecated for many years now, and no userspace
tools use it anymore, so it should be safe to finally remove it.

Reported-by: Kay Sievers <kay@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/media/go7007/go7007.txt

@@ -87,7 +87,6 @@ kernel as built-in or modules:
 	CONFIG_SOUND             - Sound card support
 	CONFIG_SND               - Advanced Linux Sound Architecture
 	CONFIG_USB               - Support for Host-side USB
-	CONFIG_USB_DEVICEFS      - USB device filesystem
 	CONFIG_USB_EHCI_HCD      - EHCI HCD (USB 2.0) support
 
 Additionally, to use the example application, the following options need to

drivers/usb/core/Kconfig

@@ -27,35 +27,6 @@ config USB_ANNOUNCE_NEW_DEVICES
 comment "Miscellaneous USB options"
 	depends on USB
 
-config USB_DEVICEFS
-	bool "USB device filesystem (DEPRECATED)"
-	depends on USB
-	---help---
-	  If you say Y here (and to "/proc file system support" in the "File
-	  systems" section, above), you will get a file /proc/bus/usb/devices
-	  which lists the devices currently connected to your USB bus or
-	  busses, and for every connected device a file named
-	  "/proc/bus/usb/xxx/yyy", where xxx is the bus number and yyy the
-	  device number; the latter files can be used by user space programs
-	  to talk directly to the device. These files are "virtual", meaning
-	  they are generated on the fly and not stored on the hard drive.
-
-	  You may need to mount the usbfs file system to see the files, use
-	  mount -t usbfs none /proc/bus/usb
-
-	  For the format of the various /proc/bus/usb/ files, please read
-	  <file:Documentation/usb/proc_usb_info.txt>.
-
-	  Modern Linux systems do not use this.
-
-	  Usbfs entries are files and not character devices; usbfs can't
-	  handle Access Control Lists (ACL) which are the default way to
-	  grant access to USB devices for untrusted users of a desktop
-	  system.
-
-	  The usbfs functionality is replaced by real device-nodes managed by
-	  udev.  These nodes lived in /dev/bus/usb and are used by libusb.
-
 config USB_DEVICE_CLASS
 	bool "USB device class-devices (DEPRECATED)"
 	depends on USB

drivers/usb/core/Makefile

@@ -9,6 +9,5 @@ usbcore-y += config.o file.o buffer.o sysfs.o endpoint.o
 usbcore-y += devio.o notify.o generic.o quirks.o devices.o
 
 usbcore-$(CONFIG_PCI)		+= hcd-pci.o
-usbcore-$(CONFIG_USB_DEVICEFS)	+= inode.o
 
 obj-$(CONFIG_USB)		+= usbcore.o

drivers/usb/core/devio.c

@@ -727,17 +727,6 @@ static int usbdev_open(struct inode *inode, struct file *file)
 	if (imajor(inode) == USB_DEVICE_MAJOR)
 		dev = usbdev_lookup_by_devt(inode->i_rdev);
 
-#ifdef CONFIG_USB_DEVICEFS
-	/* procfs file */
-	if (!dev) {
-		dev = inode->i_private;
-		if (dev && dev->usbfs_dentry &&
-					dev->usbfs_dentry->d_inode == inode)
-			usb_get_dev(dev);
-		else
-			dev = NULL;
-	}
-#endif
 	mutex_unlock(&usbfs_mutex);
 
 	if (!dev)

drivers/usb/core/driver.c

@@ -726,16 +726,6 @@ static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
 		return -ENODEV;
 	}
 
-#ifdef	CONFIG_USB_DEVICEFS
-	/* If this is available, userspace programs can directly read
-	 * all the device descriptors we don't tell them about.  Or
-	 * act as usermode drivers.
-	 */
-	if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d",
-			   usb_dev->bus->busnum, usb_dev->devnum))
-		return -ENOMEM;
-#endif
-
 	/* per-device configurations are common */
 	if (add_uevent_var(env, "PRODUCT=%x/%x/%x",
 			   le16_to_cpu(usb_dev->descriptor.idVendor),
@@ -788,15 +778,13 @@ int usb_register_device_driver(struct usb_device_driver *new_udriver,
 
 	retval = driver_register(&new_udriver->drvwrap.driver);
 
-	if (!retval) {
+	if (!retval)
 		pr_info("%s: registered new device driver %s\n",
 			usbcore_name, new_udriver->name);
-		usbfs_update_special();
-	} else {
+	else
 		printk(KERN_ERR "%s: error %d registering device "
 			"	driver %s\n",
 			usbcore_name, retval, new_udriver->name);
-	}
 
 	return retval;
 }
@@ -815,7 +803,6 @@ void usb_deregister_device_driver(struct usb_device_driver *udriver)
 			usbcore_name, udriver->name);
 
 	driver_unregister(&udriver->drvwrap.driver);
-	usbfs_update_special();
 }
 EXPORT_SYMBOL_GPL(usb_deregister_device_driver);
 
@@ -856,8 +843,6 @@ int usb_register_driver(struct usb_driver *new_driver, struct module *owner,
 	if (retval)
 		goto out;
 
-	usbfs_update_special();
-
 	retval = usb_create_newid_files(new_driver);
 	if (retval)
 		goto out_newid;
@@ -897,8 +882,6 @@ void usb_deregister(struct usb_driver *driver)
 	usb_remove_newid_files(driver);
 	driver_unregister(&driver->drvwrap.driver);
 	usb_free_dynids(driver);
-
-	usbfs_update_special();
 }
 EXPORT_SYMBOL_GPL(usb_deregister);