This is a note to let you know that I've just added the patch titled
crypto: x86/crc32c - fix building with clang ias
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-x86-crc32c-fix-building-with-clang-ias.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 44623b2818f4a442726639572f44fd9b6d0ef68c Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Wed, 27 May 2020 16:17:40 +0200
Subject: crypto: x86/crc32c - fix building with clang ias
From: Arnd Bergmann <arnd@xxxxxxxx>
commit 44623b2818f4a442726639572f44fd9b6d0ef68c upstream.
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@xxxxxxxx>
Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
[jc: Fixed conflicts due to lack of 34fdce6981b9 ("x86: Change {JMP,CALL}_NOSPEC argument")]
Signed-off-by: Jian Cai <jiancai@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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
Patches currently in stable-queue which might be from arnd@xxxxxxxx are
queue-5.4/crypto-x86-crc32c-fix-building-with-clang-ias.patch
