Regression found on mips gcc-10 built with defconfig Following build warnings / errors reported on linux next 20211027.

The bisect tool pointing to the following commit The first bad commit:

commit 4cb6f4df976b288aa02bbb658d38e73d34d8231f irq: mips: simplify do_domain_IRQ()

metadata: git_describe: next-20211027 git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git_short_log: ae5179317e79 ("Add linux-next specific files for 20211027") target_arch: mips toolchain: gcc-10

build error : -------------- <stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp] arch/mips/kernel/irq.c: In function 'do_domain_IRQ': arch/mips/kernel/irq.c:114:19: error: unused variable 'desc' [-Werror=unused-variable] struct irq_desc *desc; ^~~~ cc1: all warnings being treated as errors

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

build link: ----------- https://builds.tuxbuild.com/205S9XOzkonL7F3xvY8YUO2l1QT/build.log

build config: ------------- https://builds.tuxbuild.com/205S9XOzkonL7F3xvY8YUO2l1QT/config

# To install tuxmake on your system globally # sudo pip3 install -U tuxmake tuxmake --runtime podman --target-arch mips --toolchain gcc-10 --kconfig defconfig

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