linux-kernel - [next] arm64: efi-rt-wrapper.S:8: Error: unknown mnemonic `bti' -- `bti c'

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Date:   Thu, 16 Dec 2021 09:30:44 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Mark Brown <broonie@...nel.org>
Subject: [next] arm64: efi-rt-wrapper.S:8: Error: unknown mnemonic `bti' --
 `bti c'

[ Please ignore this email if it is already reported ]

While building Linux next 20211215 arm64 defconfig with gcc-8
following warnings / errors noticed.
and gcc-9, gcc-10 and gcc-11 builds pass.

make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/current \
  ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
  CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- \
  'CC=sccache aarch64-linux-gnu-gcc' \
  'HOSTCC=sccache gcc'

/builds/linux/arch/arm64/kernel/efi-rt-wrapper.S: Assembler messages:
/builds/linux/arch/arm64/kernel/efi-rt-wrapper.S:8: Error: unknown
mnemonic `bti' -- `bti c'
make[3]: *** [/builds/linux/scripts/Makefile.build:411:
arch/arm64/kernel/efi-rt-wrapper.o] Error 1


meta data:
-----------
    git describe: next-20211215
    git_repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
    git_sha: 93bf6eee76c0e716f6b32de690b1c52991547bb4
    git_short_log: 93bf6eee76c0 (\"Add linux-next specific files for 20211215\")
    target_arch: arm64
    toolchain: gcc-8

steps to reproduce:
# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake

tuxmake --runtime podman --target-arch arm64 --toolchain gcc-8
--kconfig defconfig

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

build log:
https://builds.tuxbuild.com/22LCvXNzzZHquxsEYJUxEGe1kHW/

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