linux-kernel - 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]

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Date:   Tue, 26 Jul 2022 10:18:08 +0200
From:   "Das, Nirmoy" <nirmoy.das@...el.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        <regressions@...ts.linux.dev>, <lkft-triage@...ts.linaro.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
CC:     Matthew Auld <matthew.auld@...el.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Nathan Chancellor <nathan@...nel.org>
Subject: 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]

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@...aro.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