mpt_ioctl_eventquery
struct mpt_ioctl_eventquery __user *uarg = (void __user *) arg;
struct mpt_ioctl_eventquery karg;
if (copy_from_user(&karg, uarg, sizeof(struct mpt_ioctl_eventquery))) {
if (copy_to_user((char __user *)arg, &karg, sizeof(struct mpt_ioctl_eventquery))) {
#define MPTEVENTQUERY _IOWR(MPT_MAGIC_NUMBER,21,struct mpt_ioctl_eventquery)