if (!cookie) { 
if (cookie == INVALID_COOKIE) { 
static int add_us_sample(struct mm_struct * mm, struct op_sample * s){	unsigned long cookie;	off_t offset;  	cookie = lookup_dcookie(mm, s->eip, &offset); 	if (!cookie) {		atomic_inc(&oprofile_stats.sample_lost_no_mapping);		return 0;	}	if (cookie != last_cookie) {		add_cookie_switch(cookie);		last_cookie = cookie;	}	add_sample_entry(offset, s->event);	return 1;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/0c0a400d1debb172c596b24ab82efab4975990a9/buffer_sync.c/buggy/drivers/oprofile/buffer_sync.c