mpt3_ioctl_command32
struct mpt3_ioctl_command32 karg32;
struct mpt3_ioctl_command32 __user *uarg;
if (_IOC_SIZE(cmd) != sizeof(struct mpt3_ioctl_command32))
uarg = (struct mpt3_ioctl_command32 __user *) arg;
struct mpt3_ioctl_command32)