Re: [PATCH] mm/memcontrol.c: fix another unused function warning

[Michal Hocko]

On Tue 01-10-19 09:36:24, Nick Desaulniers wrote:
> On Tue, Oct 1, 2019 at 7:22 AM Arnd Bergmann <arnd@xxxxxxxx> wrote:
> >
> > Removing the mem_cgroup_id_get() stub function introduced a new warning
> > of the same kind when CONFIG_MMU is disabled:
> >
> > mm/memcontrol.c:4929:13: error: unused function 'mem_cgroup_id_get_many' [-Werror,-Wunused-function]
> >
> > Address this using a __maybe_unused annotation.
> >
> > Note: alternatively, this could be moved into an #ifdef block.  Marking it
> 
> Hi Arnd,
> Thank you for the patch!  I would prefer to move the definition to the
> correct set of #ifdef guards rather than __maybe_unused.  Maybe move
> the definition of mem_cgroup_id_get_many() to just before
> __mem_cgroup_clear_mc()?  I find __maybe_unused to be a code smell.

Agreed!
-- 
Michal Hocko
SUSE Labs