crypto: ahash - improve file comment
Improve the file comment for crypto/ahash.c.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/ahash.c b/crypto/ahash.c
index 556c950..1ad402f 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -2,8 +2,12 @@
/*
* Asynchronous Cryptographic Hash operations.
*
- * This is the asynchronous version of hash.c with notification of
- * completion via a callback.
+ * This is the implementation of the ahash (asynchronous hash) API. It differs
+ * from shash (synchronous hash) in that ahash supports asynchronous operations,
+ * and it hashes data from scatterlists instead of virtually addressed buffers.
+ *
+ * The ahash API provides access to both ahash and shash algorithms. The shash
+ * API only provides access to shash algorithms.
*
* Copyright (c) 2008 Loc Ho <lho@amcc.com>
*/
