[PATCH] USB: add notifier functions to the USB core for devices and busses

This should let us get rid of all of the different hooks in the USB core for
when something has changed.

Also, some other parts of the kernel have wanted to know this kind of
information at times.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 207b1ad9d990..a2d923fd54f9 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1135,6 +1135,14 @@ usb_maxpacket(struct usb_device *udev, int pipe, int is_out)
 
 /* -------------------------------------------------------------------------- */
 
+/* Events from the usb core */
+#define USB_DEVICE_ADD          0x0001
+#define USB_DEVICE_REMOVE       0x0002
+#define USB_BUS_ADD             0x0003
+#define USB_BUS_REMOVE          0x0004
+extern void usb_register_notify(struct notifier_block *nb);
+extern void usb_unregister_notify(struct notifier_block *nb);
+
 #ifdef DEBUG
 #define dbg(format, arg...) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg)
 #else