+int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc)
+{
+ struct crypto_hash_walk walk;
+ int nbytes;
+
+ nbytes = crypto_hash_walk_first(req, &walk);
+ if (!nbytes)
+ return crypto_shash_final(desc, req->result);
+
+ do {
+ nbytes = crypto_hash_walk_last(&walk) ?
+ crypto_shash_finup(desc, walk.data, nbytes,
+ req->result) :
+ crypto_shash_update(desc, walk.data, nbytes);
+ nbytes = crypto_hash_walk_done(&walk, nbytes);
+ } while (nbytes > 0);
+
+ return nbytes;
+}
+EXPORT_SYMBOL_GPL(shash_ahash_finup);
+
+static int shash_async_finup(struct ahash_request *req)
+{
+ struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct shash_desc *desc = ahash_request_ctx(req);
+
+ desc->tfm = *ctx;
+ desc->flags = req->base.flags;
+
+ return shash_ahash_finup(req, desc);
+}
+