Re: linux-next: build failure after merge of the drm tree

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On Tue, Oct 4, 2022 at 12:21 PM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Hi broonie@xxxxxxxxxx,
>
> On Fri, 30 Sep 2022 11:54:34 +0100 broonie@xxxxxxxxxx wrote:
> >
> > After merging the drm tree, today's linux-next build (x86_64
> > allmodconfig) failed like this:
> >
> > /tmp/next/build/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function 'dc_stream_remove_writeback':
> > /tmp/next/build/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:55: error: array subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds]
> >   527 |     stream->writeback_info[j] = stream->writeback_info[i];
> >       |                                 ~~~~~~~~~~~~~~~~~~~~~~^~~
> > cc1: all warnings being treated as errors
> >
> > Caused by
> >
> >     5d8c3e836fc224 ("drm/amd/display: fix array-bounds error in dc_stream_remove_writeback()")
> >
> > I have reverted that commit for today.
>
> I am still getting this failure.  The full error is:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function 'dc_stream_remove_writeback':
> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:83: error: array subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds]
>   527 |                                 stream->writeback_info[j] = stream->writeback_info[i];
>       |                                                             ~~~~~~~~~~~~~~~~~~~~~~^~~
> In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc.h:1269,
>                  from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:29,
>                  from drivers/gpu/drm/amd/amdgpu/../display/dc/basics/dc_common.h:29,
>                  from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:27:
> drivers/gpu/drm/amd/amdgpu/../display/dc/dc_stream.h:241:34: note: while referencing 'writeback_info'
>   241 |         struct dc_writeback_info writeback_info[MAX_DWB_PIPES];
>       |                                  ^~~~~~~~~~~~~~

I'm not seeing it here, what gcc is this with?

Dave.




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