Re: [PATCH, REGRESSION v3] mm: make apply_to_page_range more robust

[Pekka Enberg]

On 01/22/2016 01:12 AM, David Rientjes wrote:
> NACK to your patch as it is just covering up buggy code silently. The 
> problem needs to be addressed in change_memory_common() to return if 
> there is no size to change (numpages == 0). It's a two line fix to 
> that function. 

So add a WARN_ON there to *warn* about the situations. There's really no 
need to BUG_ON here.

- Pekka