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[5.8,048/464] crypto: x86/crc32c - fix building with clang ias

Message ID 20200817143836.060176492@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Aug. 17, 2020, 3:10 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>


[ Upstream commit 44623b2818f4a442726639572f44fd9b6d0ef68c ]

The clang integrated assembler complains about movzxw:

arch/x86/crypto/crc32c-pcl-intel-asm_64.S:173:2: error: invalid instruction mnemonic 'movzxw'

It seems that movzwq is the mnemonic that it expects instead,
and this is what objdump prints when disassembling the file.

Fixes: 6a8ce1ef3940 ("crypto: crc32c - Optimize CRC32C calculation with PCLMULQDQ instruction")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.25.1
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Patch

diff --git a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
index 8501ec4532f4f..442599cbe7960 100644
--- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
+++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
@@ -170,7 +170,7 @@  continue_block:
 
 	## branch into array
 	lea	jump_table(%rip), %bufp
-	movzxw  (%bufp, %rax, 2), len
+	movzwq  (%bufp, %rax, 2), len
 	lea	crc_array(%rip), %bufp
 	lea     (%bufp, len, 1), %bufp
 	JMP_NOSPEC bufp