linux-kernel - [PATCH v2 17/29] crypto: aegis - use the new scatterwalk functions

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Message-ID: <20241230001418.74739-18-ebiggers@kernel.org>
Date: Sun, 29 Dec 2024 16:14:06 -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 17/29] crypto: aegis - use the new scatterwalk functions

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

Use scatterwalk_next() which consolidates scatterwalk_clamp() and
scatterwalk_map(), and use scatterwalk_done_src() which consolidates
scatterwalk_unmap(), scatterwalk_advance(), and scatterwalk_done().

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 crypto/aegis128-core.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/crypto/aegis128-core.c b/crypto/aegis128-core.c
index 6cbff298722b..15d64d836356 100644
--- a/crypto/aegis128-core.c
+++ b/crypto/aegis128-core.c
@@ -282,14 +282,14 @@ static void crypto_aegis128_process_ad(struct aegis_state *state,
 	union aegis_block buf;
 	unsigned int pos = 0;
 
 	scatterwalk_start(&walk, sg_src);
 	while (assoclen != 0) {
-		unsigned int size = scatterwalk_clamp(&walk, assoclen);
+		unsigned int size;
+		const u8 *mapped = scatterwalk_next(&walk, assoclen, &size);
 		unsigned int left = size;
-		void *mapped = scatterwalk_map(&walk);
-		const u8 *src = (const u8 *)mapped;
+		const u8 *src = mapped;
 
 		if (pos + size >= AEGIS_BLOCK_SIZE) {
 			if (pos > 0) {
 				unsigned int fill = AEGIS_BLOCK_SIZE - pos;
 				memcpy(buf.bytes + pos, src, fill);
@@ -306,13 +306,11 @@ static void crypto_aegis128_process_ad(struct aegis_state *state,
 
 		memcpy(buf.bytes + pos, src, left);
 
 		pos += left;
 		assoclen -= size;
-		scatterwalk_unmap(mapped);
-		scatterwalk_advance(&walk, size);
-		scatterwalk_done(&walk, 0, assoclen);
+		scatterwalk_done_src(&walk, mapped, size);
 	}
 
 	if (pos > 0) {
 		memset(buf.bytes + pos, 0, AEGIS_BLOCK_SIZE - pos);
 		crypto_aegis128_update_a(state, &buf, do_simd);
-- 
2.47.1