s390_pecb_req_ctx
struct s390_pecb_req_ctx *req_ctx,
struct s390_pecb_req_ctx *req_ctx = skcipher_request_ctx(req);
crypto_skcipher_set_reqsize(tfm, sizeof(struct s390_pecb_req_ctx));
struct s390_pecb_req_ctx *req_ctx = skcipher_request_ctx(req);