From 3ef91f21a66826cf1003bb7b3c51ac2de4c28182 Mon Sep 17 00:00:00 2001
From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Date: Sun, 2 Jun 2013 19:51:47 +0300
Subject: [PATCH] crypto: twofish - disable AVX2 implementation

It appears that the performance of 'vpgatherdd' is suboptimal for this kind of
workload (tested on Core i5-4570) and causes twofish_avx2 to be significantly
slower than twofish_avx. So disable the AVX2 implementation to avoid
performance regressions.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 crypto/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 622d8a48cbe9..27720af741b4 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1299,6 +1299,7 @@ config CRYPTO_TWOFISH_AVX_X86_64
 config CRYPTO_TWOFISH_AVX2_X86_64
 	tristate "Twofish cipher algorithm (x86_64/AVX2)"
 	depends on X86 && 64BIT
+	depends on BROKEN
 	select CRYPTO_ALGAPI
 	select CRYPTO_CRYPTD
 	select CRYPTO_ABLK_HELPER_X86
-- 
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