linux-kernel - [PATCH] crypto: x86/blowfish: remove redundant assignment to variable nytes

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Date:   Thu,  7 Jul 2022 09:05:46 +0100
From:   Colin Ian King <colin.i.king@...il.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H . Peter Anvin" <hpa@...or.com>, linux-crypto@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: x86/blowfish: remove redundant assignment to variable nytes

Variable nbytes is being assigned a value that is never read, it is
being re-assigned in the next statement in the while-loop. The
assignment is redundant and can be removed.

Cleans up clang scan-build warnings, e.g.:
arch/x86/crypto/blowfish_glue.c:147:10: warning: Although the value
stored to 'nbytes' is used in the enclosing expression, the value
is never actually read from 'nbytes'

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
---
 arch/x86/crypto/blowfish_glue.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/crypto/blowfish_glue.c b/arch/x86/crypto/blowfish_glue.c
index ba06322c1e39..019c64c1340a 100644
--- a/arch/x86/crypto/blowfish_glue.c
+++ b/arch/x86/crypto/blowfish_glue.c
@@ -144,7 +144,7 @@ static int cbc_encrypt(struct skcipher_request *req)
 
 	err = skcipher_walk_virt(&walk, req, false);
 
-	while ((nbytes = walk.nbytes)) {
+	while (walk.nbytes) {
 		nbytes = __cbc_encrypt(ctx, &walk);
 		err = skcipher_walk_done(&walk, nbytes);
 	}
@@ -225,7 +225,7 @@ static int cbc_decrypt(struct skcipher_request *req)
 
 	err = skcipher_walk_virt(&walk, req, false);
 
-	while ((nbytes = walk.nbytes)) {
+	while (walk.nbytes) {
 		nbytes = __cbc_decrypt(ctx, &walk);
 		err = skcipher_walk_done(&walk, nbytes);
 	}
-- 
2.35.3