linux/drivers/usb/core/notify.c

// SPDX-License-Identifier: GPL-2.0
/*
 * All the USB notify logic
 *
 * (C) Copyright 2005 Greg Kroah-Hartman <[email protected]>
 *
 * notifier functions originally based on those in kernel/sys.c
 * but fixed up to not be so broken.
 *
 * Released under the GPLv2 only.
 */


#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/notifier.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include "usb.h"

static BLOCKING_NOTIFIER_HEAD(usb_notifier_list);

/**
 * usb_register_notify - register a notifier callback whenever a usb change happens
 * @nb: pointer to the notifier block for the callback events.
 *
 * These changes are either USB devices or busses being added or removed.
 */
void usb_register_notify(struct notifier_block *nb)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * usb_unregister_notify - unregister a notifier callback
 * @nb: pointer to the notifier block for the callback events.
 *
 * usb_register_notify() must have been previously called for this function
 * to work properly.
 */
void usb_unregister_notify(struct notifier_block *nb)
{ … }
EXPORT_SYMBOL_GPL(…);


void usb_notify_add_device(struct usb_device *udev)
{ … }

void usb_notify_remove_device(struct usb_device *udev)
{ … }

void usb_notify_add_bus(struct usb_bus *ubus)
{ … }

void usb_notify_remove_bus(struct usb_bus *ubus)
{ … }