usbfs_decrease_memory_usage
usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
usbfs_decrease_memory_usage(
usbfs_decrease_memory_usage(size + sizeof(struct usb_memory));
usbfs_decrease_memory_usage(as->mem_usage);