crypto: twofish-x86_64-3way - add lrw support

Patch adds LRW support for twofish-x86_64-3way by using lrw_crypt(). Patch has
been tested with tcrypt and automated filesystem tests.

Tcrypt benchmarks results (twofish-3way/twofish-asm speed ratios):

Intel Celeron T1600 (fam:6, model:15, step:13):

size	lrw-enc	lrw-dec
16B	0.99x	1.00x
64B	1.17x	1.17x
256B	1.26x	1.27x
1024B	1.30x	1.31x
8192B	1.31x	1.32x

AMD Phenom II 1055T (fam:16, model:10):

size	lrw-enc	lrw-dec
16B	1.06x	1.01x
64B	1.08x	1.14x
256B	1.19x	1.20x
1024B	1.21x	1.22x
8192B	1.23x	1.24x

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/crypto/twofish.h b/include/crypto/twofish.h
index c408522595c6..095c901a8af3 100644
--- a/include/crypto/twofish.h
+++ b/include/crypto/twofish.h
@@ -17,6 +17,8 @@ struct twofish_ctx {
         u32 s[4][256], w[8], k[32];
 };
 
+int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key,
+                     unsigned int key_len, u32 *flags);
 int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len);
 
 #endif