Re: [PATCH] [next] drm/amdgpu: Replace one-element array with flexible-array member

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On Fri, Oct 28, 2022 at 07:33:17PM +0200, Christian König wrote:
> Am 28.10.22 um 18:36 schrieb Kees Cook:
> 
> > All that said, converting away from them can be tricky, and I think such
> > conversions need to explicitly show how they were checked for binary
> > differences[2].
> 
> Oh, that's a great idea! Yes, if this can be guaranteed then the change is
> obviously perfectly ok.
> 
> > 
> > Paulo, can you please check for deltas and report your findings in the
> > commit log? Note that add struct_size() use in the same patch may result
> > in binary differences, so for more complex cases, you may want to split
> > the 1-element conversion from the struct_size() conversions.
> > 
> > -Kees

Noted. I will reporting my findings on commit logs from now onwards. 

Given that I split the if-ternary to avoid checking "fake_edid_record->ucFakeEDIDLength"
twice then (for the current patch), yes, there will be changes to *.o|ko files.

Knowing that Christian would feel more confident with no binary changes
at this point, I will send a different patch aiming solely on the
replacement of 1-elem array without incurring binary changes.

--
Paulo A.




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