linux-kernel - powerpc: mcu_mpc8349emitx.c:189:13: error: unused variable 'ret' [-Werror=unused-variable]

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Date:   Tue, 9 Nov 2021 18:37:48 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Cc:     Scott Wood <oss@...error.net>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Anders Roxell <anders.roxell@...aro.org>
Subject: powerpc: mcu_mpc8349emitx.c:189:13: error: unused variable 'ret' [-Werror=unused-variable]

[Please ignore this email if it is already reported ]

Regression found on powerpc gcc-8/9/10 and gcc-11 built with ppc6xx_defconfig
Following build warnings / errors reported on linux next 20211109.

metadata:
    git_describe: next-20211109
    git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
    git_short_log: c8109c2ba35e (\"Add linux-next specific files for 20211109\")
    target_arch: powerpc
    toolchain: gcc-11

build error :
--------------
<stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]
arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c: In function 'mcu_remove':
arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c:189:13: error: unused
variable 'ret' [-Werror=unused-variable]
  189 |         int ret;
      |             ^~~
cc1: all warnings being treated as errors
make[4]: *** [scripts/Makefile.build:288:
arch/powerpc/platforms/83xx/mcu_mpc8349emitx.o] Error 1
make[4]: Target '__build' not remade because of errors.
make[3]: *** [scripts/Makefile.build:571: arch/powerpc/platforms/83xx] Error 2

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

build link:
-----------
https://builds.tuxbuild.com/20fICxLPRCpcISasoGwKGICBELv/build.log

build config:
-------------
https://builds.tuxbuild.com/20fICxLPRCpcISasoGwKGICBELv/config

# To install tuxmake on your system globally
# sudo pip3 install -U tuxmake
tuxmake --runtime podman --target-arch powerpc --toolchain gcc-11
--kconfig ppc6xx_defconfig


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