Re: [PATCH v2 1/2] mm,vmscan: Make unregister_shrinker() no-op if register_shrinker() failed.

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Michal Hocko wrote:
> > Since we can encourage register_shrinker() callers to check for failure
> > by marking register_shrinker() as __must_check, unregister_shrinker()
> > can stay silent.
> 
> I am not sure __must_check is the right way. We already do get
> allocation warning if the registration fails so silent unregister is
> acceptable. Unchecked register_shrinker is a bug like any other
> unchecked error path.

I consider that __must_check is the simplest way to find all of
unchecked register_shrinker bugs. Why not to encourage users to fix?

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