Re: Stack-frame warnings in display_mode_vba_32.c

[Guenter Roeck]

On 7/29/22 22:12, Paul E. McKenney wrote:
> On Fri, Jul 29, 2022 at 11:41:55PM -0300, André Almeida wrote:
> > Hi Paul,
> >
> > Às 23:25 de 29/07/22, Paul E. McKenney escreveu:
> > > Hello!
> > >
> > > I am seeing the following in allmodconfig builds of recent -next on x86:
> > >
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c: In function ‘DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation’:
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c:1659:1: error: the frame size of 2144 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
> > >   1659 | }
> > >        | ^
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c: In function ‘dml32_ModeSupportAndSystemConfigurationFull’:
> > > drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c:3799:1: error: the frame size of 2480 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
> > >   3799 | } // ModeSupportAndSystemConfigurationFull
> > >        | ^
> >
> > I think they are fixed at amd-staging-drm-next:
> >
> > git log --oneline amd/amd-staging-drm-next
> > drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
> > 953daa61981b drm/amd/display: Reduce stack size in the mode support function
> > 361e705e712d drm/amd/display: reduce stack for
> > dml32_CalculatePrefetchSchedule
> > f2dbf5a4dd1e drm/amd/display: reduce stack for
> > dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport
> > a0a68cda2ef8 drm/amd/display: reduce stack for dml32_CalculateVMRowAndSwath
> > ca6730ca0f01 drm/amd/display: reduce stack for
> > dml32_CalculateSwathAndDETConfiguration
> > 593eef8c1a5e drm/amd/display: reduce stack size in dcn32 dml (v2)
> >
> > https://gitlab.freedesktop.org/agd5f/linux/-/commits/amd-staging-drm-next/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c
>
> Very good, thank you!  I will test again on the next -next.

Did you try next-20220728 ?

groeck@server:~/src/linux-next$ git describe
next-20220728
groeck@server:~/src/linux-next$ git log --oneline drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/display_mode_vba_32.c
1b54a0121dba drm/amd/display: Reduce stack size in the mode support function
86e4863e67a9 drm/amd/display: reduce stack for dml32_CalculatePrefetchSchedule
3c3abac60117 drm/amd/display: reduce stack for dml32_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport
c3b3f9ba25e6 drm/amd/display: reduce stack for dml32_CalculateVMRowAndSwath
bac4b41d917a drm/amd/display: reduce stack for dml32_CalculateSwathAndDETConfiguration
7acc487ab57e drm/amd/display: reduce stack size in dcn32 dml (v2)

Guenter