reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git/commit/?id=51646201e21cdf40aad3925f7742a8d2ac727f43
        git remote add robh https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git
        git fetch --no-tags robh cpufreq-compile-test
        git checkout 51646201e21cdf40aad3925f7742a8d2ac727f43
        # choose either of the following two methods to reproduce the issue
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_ARMADA_AP_CPU_CLK --selectors CONFIG_ARM_ARMADA_8K_CPUFREQ -a=sh
        # 2. reproduce by make
           cd linux
           # download the config file from the "config:" link in the report, and save it as .config
           make ARCH=sh olddefconfig