pkey_kblob2pkey2
#define PKEY_KBLOB2PROTK2 _IOWR(PKEY_IOCTL_MAGIC, 0x1A, struct pkey_kblob2pkey2)
static int pkey_ioctl_kblob2protk2(struct pkey_kblob2pkey2 __user *utp)
struct pkey_kblob2pkey2 ktp;
rc = pkey_ioctl_kblob2protk2((struct pkey_kblob2pkey2 __user *)arg);