[next] clang: drivers/gpu/drm/i915/gt/intel_region_lmem.c:94:23: error: result of comparison of constant 4294967296 with expression of type 'resource_size_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare]

[next] clang: drivers/gpu/drm/i915/gt/intel_region_lmem.c:94:23: error: result of comparison of constant 4294967296 with expression of type 'resource_size_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare]

[Naresh Kamboju]

The Linux next-20220725 i386 clang builds failed due this build error,

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

Regressions found on i386:

   - build-clang-11-defconfig
   - build-clang-14-lkftconfig
   - build-clang-13-defconfig
   - build-clang-12-defconfig
   - build-clang-13-lkftconfig
   - build-clang-12-lkftconfig
   - build-clang-14-defconfig

Steps to reproduce:
-------------------
tuxmake --runtime podman \
        --target-arch i386 \
        --toolchain clang-14 \
        --kconfig
https://builds.tuxbuild.com/2CQwgxqR0lJKwPMl2LxaDTNwsq0/config \
          LLVM=1 \
          LLVM_IAS=1

Build error log:
-----------------
make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1
ARCH=i386 CROSS_COMPILE=i686-linux-gnu- 'HOSTCC=sccache clang'
'CC=sccache clang'
drivers/gpu/drm/i915/gt/intel_region_lmem.c:94:23: error: result of
comparison of constant 4294967296 with expression of type
'resource_size_t' (aka 'unsigned int') is always false
[-Werror,-Wtautological-constant-out-of-range-compare]
                    root_res->start > 0x100000000ull)
                    ~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
1 error generated.
make[5]: *** [scripts/Makefile.build:250:
drivers/gpu/drm/i915/gt/intel_region_lmem.o] Error 1
make[5]: Target '__build' not remade because of errors.


Build link:
https://builds.tuxbuild.com/2CQwgxqR0lJKwPMl2LxaDTNwsq0/


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

Re: [next] clang: drivers/gpu/drm/i915/gt/intel_region_lmem.c:94:23: error: result of comparison of constant 4294967296 with expression of type 'resource_size_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare]

[Das, Nirmoy]

Hi Naresh,


Thanks for your email. This is a oversight from me. I will send a patch 
to disable pci resize on 32bit machine.


Thanks,

Nirmoy

On 7/26/2022 8:58 AM, Naresh Kamboju wrote:
> The Linux next-20220725 i386 clang builds failed due this build error,
>
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
>
> Regressions found on i386:
>
>     - build-clang-11-defconfig
>     - build-clang-14-lkftconfig
>     - build-clang-13-defconfig
>     - build-clang-12-defconfig
>     - build-clang-13-lkftconfig
>     - build-clang-12-lkftconfig
>     - build-clang-14-defconfig
>
> Steps to reproduce:
> -------------------
> tuxmake --runtime podman \
>          --target-arch i386 \
>          --toolchain clang-14 \
>          --kconfig
> https://builds.tuxbuild.com/2CQwgxqR0lJKwPMl2LxaDTNwsq0/config \
>            LLVM=1 \
>            LLVM_IAS=1
>
> Build error log:
> -----------------
> make --silent --keep-going --jobs=8
> O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1
> ARCH=i386 CROSS_COMPILE=i686-linux-gnu- 'HOSTCC=sccache clang'
> 'CC=sccache clang'
> drivers/gpu/drm/i915/gt/intel_region_lmem.c:94:23: error: result of
> comparison of constant 4294967296 with expression of type
> 'resource_size_t' (aka 'unsigned int') is always false
> [-Werror,-Wtautological-constant-out-of-range-compare]
>                      root_res->start > 0x100000000ull)
>                      ~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
> 1 error generated.
> make[5]: *** [scripts/Makefile.build:250:
> drivers/gpu/drm/i915/gt/intel_region_lmem.o] Error 1
> make[5]: Target '__build' not remade because of errors.
>
>
> Build link:
> https://builds.tuxbuild.com/2CQwgxqR0lJKwPMl2LxaDTNwsq0/
>
>
> --
> Linaro LKFT
> https://lkft.linaro.org