linux-kernel - selftests: arm64: hwcap.c:51:15: error: instruction requires: crc

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Date:   Thu, 17 Aug 2023 15:33:18 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     clang-built-linux <llvm@...ts.linux.dev>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org
Cc:     Kristina Martsenko <kristina.martsenko@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Mark Brown <broonie@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Anders Roxell <anders.roxell@...aro.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: selftests: arm64: hwcap.c:51:15: error: instruction requires: crc

While building selftests arm64 following warnings / errors noticed on the
Linux next-20230817 tag ( from next-20230815 )

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

Build errors:
------------
selftests/arm64/abi/hwcap
hwcap.c:51:15: error: instruction requires: crc
   51 |         asm volatile("crc32w w0, w0, w1");
      |                      ^
<inline asm>:1:2: note: instantiated into assembly here
    1 |         crc32w w0, w0, w1
      |         ^
1 error generated.
make[5]: *** [../../lib.mk:181: selftests/arm64/abi/hwcap] Error 1

Links:
 - https://storage.tuxsuite.com/public/linaro/lkft/builds/2U69ue7AaypfY7eRU4UUygecrDx/

Steps to reproduce:
tuxmake --runtime podman --target-arch arm64 --toolchain clang-17
--kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2U69ue7AaypfY7eRU4UUygecrDx/config
LLVM=1 LLVM_IAS=1 dtbs dtbs-legacy headers kernel kselftest modules

--
Linaro LKFT
https://lkft.linaro.org