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[v2] crypto: powerpc - CRYPT_CRC32C_VPMSUM should depend on ALTIVEC

Message ID 1470696375-22023-1-git-send-email-mpe@ellerman.id.au (mailing list archive)
State Not Applicable
Headers show

Commit Message

Michael Ellerman Aug. 8, 2016, 10:46 p.m. UTC
The optimised crc32c implementation depends on VMX (aka. Altivec)
instructions, so the kernel must be built with Altivec support in order
for the crc32c code to build.

Fixes: 6dd7a82cc54e ("crypto: powerpc - Add POWER8 optimised crc32c")
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 crypto/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

v2: No change. Send to linux-crypto.

Comments

Herbert Xu Aug. 9, 2016, 10:36 a.m. UTC | #1
On Tue, Aug 09, 2016 at 08:46:15AM +1000, Michael Ellerman wrote:
> The optimised crc32c implementation depends on VMX (aka. Altivec)
> instructions, so the kernel must be built with Altivec support in order
> for the crc32c code to build.
> 
> Fixes: 6dd7a82cc54e ("crypto: powerpc - Add POWER8 optimised crc32c")
> Acked-by: Anton Blanchard <anton@samba.org>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Patch applied.  Thanks.
diff mbox

Patch

diff --git a/crypto/Kconfig b/crypto/Kconfig
index a9377bef25e3..84d71482bf08 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -439,7 +439,7 @@  config CRYPTO_CRC32C_INTEL
 
 config CRYPT_CRC32C_VPMSUM
 	tristate "CRC32c CRC algorithm (powerpc64)"
-	depends on PPC64
+	depends on PPC64 && ALTIVEC
 	select CRYPTO_HASH
 	select CRC32
 	help