On Thu, Sep 29, 2022 at 03:40:53PM +0800, Kemeng Shi wrote: > Function blkcg_iolatency_throttle will make sure blkg->parent is not > NULL before calls check_scale_change. And function check_scale_change > is only called in blkcg_iolatency_throttle. > > Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxx> Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx> Thanks, Josef