From: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Date: Sun, 2 Jun 2013 16:51:47 +0000 (+0300)
Subject: crypto: twofish - disable AVX2 implementation
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3ef91f21a66826cf1003bb7b3c51ac2de4c28182;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

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>
---

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