Regressions on arm, powerpc, s390 defconfig builds failed with toolchain clang-nightly on the mainline master branch.

First seen on the v6.14-12245-g91e5bfe317d8 Good: v6.14-11270-g08733088b566 Bad: v6.14-12245-g91e5bfe317d8

Regressions found on arm: - build/clang-nightly-nhk8815_defconfig

Regressions found on powerpc: - build/clang-nightly-lkftconfig-lto-full - build/clang-nightly-ppc64e_defconfig - build/clang-nightly-lkftconfig-lto-thing - build/clang-nightly-defconfig - build/clang-nightly-lkftconfig-hardening

Regressions found on s390: - build/clang-nightly-lkftconfig-lto-thing - build/clang-nightly-lkftconfig-lto-full - build/clang-nightly-defconfig - build/clang-nightly-lkftconfig-hardening

Regression Analysis: - New regression? Yes - Reproducibility? Yes

Build regression: arm powerpc s390 modpost "wcslen" fs smb client cifs.ko undefined

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

## Build log

ERROR: modpost: "wcslen" [fs/smb/client/cifs.ko] undefined!

## Source * Kernel version: 6.14.0 * Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git * Git sha: 91e5bfe317d8f8471fbaa3e70cf66cae1314a516 * Git describe: v6.14-12245-g91e5bfe317d8 * Project details: https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.14-12245-g... * Arcitures: arm, powerpc, s390 * Toolchains: clang-nightly

## Build * Build log: https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.14-12245-g... * Build history: https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.14-12245-g... * Build details: https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.14-12245-g... * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2v9EdO7KHQCCZBICM0Mvp... * Kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2v9EdO7KHQCCZBICM0Mvp...

## Steps to reproduce - tuxmake --runtime podman --target-arch arm --toolchain clang-nightly --kconfig nhk8815_defconfig LLVM=1 LLVM_IAS=1 - tuxmake --runtime podman --target-arch powerpc --toolchain clang-nightly --kconfig defconfig LLVM=1 LLVM_IAS=0 LD=powerpc64le-linux-gnu-ld - tuxmake --runtime podman --target-arch s390 --toolchain clang-nightly --kconfig defconfig LLVM_IAS=1

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