uevent helper

static ssize_t (struct kobject *kobj,
				  struct kobj_attribute *attr, char *buf)
{
    return sprintf(buf, "%sn", uevent_helper);
}

static ssize_t uevent_helper_store(struct kobject *kobj,
				   struct kobj_attribute *attr,
				   const char *buf, size_t count)
{
    if (count+1 > UEVENT_HELPER_PATH_LEN)
        return -ENOENT;
    memcpy(uevent_helper, buf, count);	
    uevent_helper[count] = '