input_unregister_device(&pcspkr_dev); 
input_unregister_device(pcspkr_dev); 
static void __exit pcspkr_exit(void){        input_unregister_device(&pcspkr_dev);	/* turn off the speaker */	pcspkr_event(NULL, EV_SND, SND_BELL, 0);}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/76b7cddfd576331761e945a508254abad11039e9/pcspkr.c/clean/drivers/input/misc/pcspkr.c