From 7a6623cc6867b5f24f750a7c16b996b0cbbc63b5 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Tue, 5 Jan 2021 17:47:57 +0100
Subject: crypto: x86/cast6 - drop CTR mode implementation

CAST6 in CTR mode is never used by the kernel directly, and is highly
unlikely to be relied upon by dm-crypt or algif_skcipher. So let's drop
the accelerated CTR mode implementation, and instead, rely on the CTR
template and the bare cipher.

Acked-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 crypto/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'crypto')

diff --git a/crypto/Kconfig b/crypto/Kconfig
index fed73fff5a65..3f51c5dfc2a9 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1397,6 +1397,7 @@ config CRYPTO_CAST6_AVX_X86_64
 	select CRYPTO_GLUE_HELPER_X86
 	select CRYPTO_SIMD
 	imply CRYPTO_XTS
+	imply CRYPTO_CTR
 	help
 	  The CAST6 encryption algorithm (synonymous with CAST-256) is
 	  described in RFC2612.
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