scratch_free     1232 drivers/media/usb/usbvision/usbvision-core.c 		if (scratch_free(usbvision) < packet_len) {
scratch_free     1236 drivers/media/usb/usbvision/usbvision-core.c 			scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));