linux-kernel - [PATCH v2 05/29] crypto: skcipher - fold skcipher_walk_skcipher() into skcipher_walk

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Message-ID: <20241230001418.74739-6-ebiggers@kernel.org>
Date: Sun, 29 Dec 2024 16:13:54 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: linux-crypto@...r.kernel.org
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 05/29] crypto: skcipher - fold skcipher_walk_skcipher() into skcipher_walk_virt()

From: Eric Biggers <ebiggers@...gle.com>

Fold skcipher_walk_skcipher() into skcipher_walk_virt() which is its
only remaining caller.  No change in behavior.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 crypto/skcipher.c | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 98606def1bf9..17f4bc79ca8b 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -304,23 +304,26 @@ static int skcipher_walk_first(struct skcipher_walk *walk)
 	walk->page = NULL;
 
 	return skcipher_walk_next(walk);
 }
 
-static int skcipher_walk_skcipher(struct skcipher_walk *walk,
-				  struct skcipher_request *req)
+int skcipher_walk_virt(struct skcipher_walk *walk,
+		       struct skcipher_request *req, bool atomic)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+	int err = 0;
+
+	might_sleep_if(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
 
 	walk->total = req->cryptlen;
 	walk->nbytes = 0;
 	walk->iv = req->iv;
 	walk->oiv = req->iv;
 
 	if (unlikely(!walk->total))
-		return 0;
+		goto out;
 
 	scatterwalk_start(&walk->in, req->src);
 	scatterwalk_start(&walk->out, req->dst);
 
 	walk->flags &= ~SKCIPHER_WALK_SLEEP;
@@ -334,22 +337,12 @@ static int skcipher_walk_skcipher(struct skcipher_walk *walk,
 	if (alg->co.base.cra_type != &crypto_skcipher_type)
 		walk->stride = alg->co.chunksize;
 	else
 		walk->stride = alg->walksize;
 
-	return skcipher_walk_first(walk);
-}
-
-int skcipher_walk_virt(struct skcipher_walk *walk,
-		       struct skcipher_request *req, bool atomic)
-{
-	int err;
-
-	might_sleep_if(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
-
-	err = skcipher_walk_skcipher(walk, req);
-
+	err = skcipher_walk_first(walk);
+out:
 	walk->flags &= atomic ? ~SKCIPHER_WALK_SLEEP : ~0;
 
 	return err;
 }
 EXPORT_SYMBOL_GPL(skcipher_walk_virt);
-- 
2.47.1