linux-kernel - [next] [clang] x86_64-linux-gnu-ld: mm/mremap.o: in function `move_pgt_entry': mremap.c:(.text+0x763): undefined reference to `__compiletime_assert

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Message-ID: <CA+G9fYsWHE5Vu9T3FV-vtHHbVFJWEF=bmjQxwaZs3uVYef028g@mail.gmail.com>
Date:   Thu, 17 Jun 2021 17:41:11 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        lkft-triage@...ts.linaro.org,
        open list <linux-kernel@...r.kernel.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [next] [clang] x86_64-linux-gnu-ld: mm/mremap.o: in function
 `move_pgt_entry': mremap.c:(.text+0x763): undefined reference to `__compiletime_assert_342'

Linux next 20210617 tag following x86_64 builds failed with clang-10
and clang-11.
Regressions found on x86_64:

 - build/clang-11-tinyconfig
 - build/clang-11-allnoconfig
 - build/clang-10-tinyconfig
 - build/clang-10-allnoconfig
 - build/clang-11-x86_64_defconfig
 - build/clang-10-defconfig

We are running git bisect to identify the bad commit.

Build log:
------------
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool:
eb_relocate_parse_slow()+0x466: stack state mismatch: cfa1=4+120
cfa2=-1+0
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool:
eb_copy_relocations()+0x1e0: stack state mismatch: cfa1=4+104
cfa2=-1+0
x86_64-linux-gnu-ld: mm/mremap.o: in function `move_pgt_entry':
mremap.c:(.text+0x763): undefined reference to `__compiletime_assert_342'
make[1]: *** [/builds/linux/Makefile:1252: vmlinux] Error 1
make[1]: Target '__all' not remade because of errors.
make: *** [Makefile:222: __sub-make] Error 2
make: Target '__all' not remade because of errors.
make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/current ARCH=x86_64
CROSS_COMPILE=x86_64-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache
clang' headers_install
INSTALL_HDR_PATH=/home/tuxbuild/.cache/tuxmake/builds/current/install_hdr/
tar caf /home/tuxbuild/.cache/tuxmake/builds/current/headers.tar.xz -C
/home/tuxbuild/.cache/tuxmake/builds/current/install_hdr .

ref:
https://builds.tuxbuild.com/1u4ZKFTh12vrYBVf8b1xGpaFOrE/

# TuxMake is a command line tool and Python library that provides
# portable and repeatable Linux kernel builds across a variety of
# architectures, toolchains, kernel configurations, and make targets.
#
# TuxMake supports the concept of runtimes.
# See https://docs.tuxmake.org/runtimes/, for that to work it requires
# that you install podman or docker on your system.
#
# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake
#
# See https://docs.tuxmake.org/ for complete documentation.

tuxmake --runtime podman --target-arch x86_64 --toolchain clang-11
--kconfig x86_64_defconfig

ref:
https://builds.tuxbuild.com/1u4ZKFTh12vrYBVf8b1xGpaFOrE/

build info:
    git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
    git_sha: 7d9c6b8147bdd76d7eb2cf6f74f84c6918ae0939
    git_short_log: 7d9c6b8147bd (\Add linux-next specific files for 20210617\)
    kconfig: x86_64_defconfig
    kernel_image:
    kernel_version: 5.13.0-rc6
    toolchain: clang-11

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