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Message-Id: <20200527141754.1850968-1-arnd@arndb.de>
Date: Wed, 27 May 2020 16:17:40 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
x86@...nel.org, Tim Chen <tim.c.chen@...ux.intel.com>
Cc: Arnd Bergmann <arnd@...db.de>, "H. Peter Anvin" <hpa@...or.com>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Jiri Slaby <jslaby@...e.cz>,
Peter Zijlstra <peterz@...radead.org>,
linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
clang-built-linux@...glegroups.com
Subject: [PATCH] x86: crypto: fix building crc32c with clang ias
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@...db.de>
---
arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
index 8501ec4532f4..442599cbe796 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
--
2.26.2
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