-static void cast6_decrypt (void * ctx, u8 * outbuf, const u8 * inbuf) {
- struct cast6_ctx * c = (struct cast6_ctx *)ctx;
+static void cast6_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf) {
+ struct cast6_ctx * c = crypto_tfm_ctx(tfm);