pmcraid_ioctl_header
struct pmcraid_ioctl_header *hdr
if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
struct pmcraid_ioctl_header *hdr = NULL;
hdr = kmalloc_obj(struct pmcraid_ioctl_header);
arg += sizeof(struct pmcraid_ioctl_header);
#define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))