[PATCH 25/30] crypto: ahash - improve file comment

[Eric Biggers <ebiggers@kernel.org>]

From: Eric Biggers <ebiggers@google.com>

Improve the file comment for crypto/ahash.c.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 crypto/ahash.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/crypto/ahash.c b/crypto/ahash.c
index 556c950100936..1ad402f4dac6c 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -1,16 +1,20 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * 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>
  */
 
 #include <crypto/scatterwalk.h>
 #include <linux/cryptouser.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/sched.h>
-- 
2.42.0