Following regression found with clang i386 and x86 builds failed on Linux next-20220711 tag. Please find the build error logs.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org Reported-by: Naresh Kamboju naresh.kamboju@linaro.org
Regressions found on i386:
- build-clang-12-defconfig - build-clang-nightly-lkftconfig - build-clang-13-defconfig - build-clang-12-lkftconfig - build-clang-14-lkftconfig - build-clang-nightly-defconfig - build-clang-13-lkftconfig
Regressions found on x86_64:
- build-clang-nightly-x86_64_defconfig - build-clang-nightly-lkftconfig - build-clang-13-lkftconfig - build-clang-12-lkftconfig - build-clang-13-lkftconfig-kcsan - build-clang-14-lkftconfig - build-clang-14-x86_64_defconfig
make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1 ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache clang' block/bio.c:1232:6: error: variable 'i' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (unlikely(!size)) { ^~~~~~~~~~~~~~~ include/linux/compiler.h:78:22: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~ block/bio.c:1254:9: note: uninitialized use occurs here while (i < nr_pages) ^ block/bio.c:1232:2: note: remove the 'if' if its condition is always false if (unlikely(!size)) { ^~~~~~~~~~~~~~~~~~~~~~ block/bio.c:1202:17: note: initialize the variable 'i' to silence this warning unsigned len, i; ^ = 0 1 error generated.
Build details: --------------- download_url: https://builds.tuxbuild.com/2BnQO6OXSJejfpLO4fQ3fWa5wVT/, git_describe: next-20220711, git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next, git_sha: 4112a8699ae2eac797415b9be1d7901b3f79e772, git_short_log: 4112a8699ae2 (\Add linux-next specific files for 20220711), kconfig: https://builds.tuxbuild.com/2BnQO6OXSJejfpLO4fQ3fWa5wVT/config kernel_version: 5.19.0-rc6, make_variables: { LLVM: 1, LLVM_IAS: 1 },
Steps to reproduce: tuxmake --runtime podman --target-arch x86_64 --toolchain clang-14 --kconfig https://builds.tuxbuild.com/2BnQO6OXSJejfpLO4fQ3fWa5wVT/config LLVM=1 LLVM_IAS=1
Best regards Naresh Kamboju
-- Linaro LKFT https://lkft.linaro.org