[PATCH] drm/amdgpu: Mark mmhub_v1_8_mmea_err_status_reg as __maybe_unused

[Nathan Chancellor]

On Thu, May 25, 2023 at 12:26:56PM -0400, Luben Tuikov wrote:
> On 2023-05-25 11:22, Nathan Chancellor wrote:
> > On Fri, May 19, 2023 at 06:14:38PM +0530, Srinivasan Shanmugam wrote:
> >> Silencing the compiler from below compilation error:
> >>
> >> drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c:704:23: error: variable 'mmhub_v1_8_mmea_err_status_reg' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration]
> >> static const uint32_t mmhub_v1_8_mmea_err_status_reg[] = {
> >>                       ^
> >> 1 error generated.
> >>
> >> Mark the variable as __maybe_unused to make it clear to clang that this
> >> is expected, so there is no more warning.
> >>
> >> Cc: Christian König <christian.koenig at amd.com>
> >> Cc: Lijo Lazar <lijo.lazar at amd.com>
> >> Cc: Luben Tuikov <luben.tuikov at amd.com>
> >> Cc: Alex Deucher <alexander.deucher at amd.com>
> >> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
> > 
> > Traditionally, this attribute would go between the [] and =, but that is
> > a nit. Can someone please pick this up to unblock our builds on -next?
> > 
> > Reviewed-by: Nathan Chancellor <nathan at kernel.org>
> 
> I'll pick this up, fix it, and submit to amd-staging-drm-next.

Thanks a lot :)

> Which -next are you referring to, Nathan?

linux-next, this warning breaks the build when -Werror is enabled, such
as with allmodconfig:

https://storage.tuxsuite.com/public/clangbuiltlinux/continuous-integration2/builds/2QHtlCTz2JL0yXNpRB5hVmiP9lq/build.log

Cheers,
Nathan

> >> ---
> >>  drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c | 1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
> >> index 3648994724c2..cba087e529c0 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
> >> +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
> >> @@ -701,6 +701,7 @@ static void mmhub_v1_8_reset_ras_error_count(struct amdgpu_device *adev)
> >>  		mmhub_v1_8_inst_reset_ras_error_count(adev, i);
> >>  }
> >>  
> >> +__maybe_unused
> >>  static const uint32_t mmhub_v1_8_mmea_err_status_reg[] = {
> >>  	regMMEA0_ERR_STATUS,
> >>  	regMMEA1_ERR_STATUS,
> >> -- 
> >> 2.25.1
> >>
>