fix warning:
drivers/usb/core/devio.c:1226:20: warning: incorrect type in assignment (different address spaces)
drivers/usb/core/devio.c:1226:20:    expected void *usercontext
drivers/usb/core/devio.c:1226:20:    got void [noderef] <asn:1>*
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
        int error_count;
        unsigned int signr;     /* signal to be sent on completion,
                                  or 0 if none should be sent. */
-       void *usercontext;
+       void __user *usercontext;
        struct usbdevfs_iso_packet_desc iso_frame_desc[0];
 };