linux-kernel - [ 047/115] crypto: crc32-pclmul

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Date:	Mon,  6 May 2013 13:44:43 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Sandy Wu <sandyw@...tter.com>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [ 047/115] crypto: crc32-pclmul - Use gas macro for pclmulqdq

3.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sandy Wu <sandyw@...tter.com>

commit 57ae1b0532977b30184aaba04b6cafe0a284c21f upstream.

Occurs when CONFIG_CRYPTO_CRC32C_INTEL=y and CONFIG_CRYPTO_CRC32C_INTEL=y.
Older versions of bintuils do not support the pclmulqdq instruction. The
PCLMULQDQ gas macro is used instead.

Signed-off-by: Sandy Wu <sandyw@...tter.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/crypto/crc32c-pcl-intel-asm_64.S |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
+++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
@@ -42,6 +42,7 @@
  * SOFTWARE.
  */
 
+#include <asm/inst.h>
 #include <linux/linkage.h>
 
 ## ISCSI CRC 32 Implementation with crc32 and pclmulqdq Instruction
@@ -225,10 +226,10 @@ LABEL crc_ %i
 	movdqa  (bufp), %xmm0			# 2 consts: K1:K2
 
 	movq    crc_init, %xmm1			# CRC for block 1
-	pclmulqdq $0x00,%xmm0,%xmm1		# Multiply by K2
+	PCLMULQDQ 0x00,%xmm0,%xmm1		# Multiply by K2
 
 	movq    crc1, %xmm2			# CRC for block 2
-	pclmulqdq $0x10, %xmm0, %xmm2		# Multiply by K1
+	PCLMULQDQ 0x10, %xmm0, %xmm2		# Multiply by K1
 
 	pxor    %xmm2,%xmm1
 	movq    %xmm1, %rax


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