linux-kernel - Re: [PATCH v3] drm/msm/a6xx: use __unused__ to fix compiler warnings for gen7

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Date: Wed, 5 Jun 2024 09:29:18 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>, 
	Sean Paul <sean@...rly.run>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Daniel Vetter <daniel@...ll.ch>, Connor Abbott <cwabbott0@...il.com>, 
	dri-devel@...ts.freedesktop.org, seanpaul@...omium.org, quic_jesszhan@...cinc.com, 
	Rob Clark <robdclark@...omium.org>, linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] drm/msm/a6xx: use __unused__ to fix compiler warnings
 for gen7_* includes

On Tue, Jun 04, 2024 at 05:38:28PM -0700, Abhinav Kumar wrote:
> GCC diagnostic pragma method throws below warnings in some of the versions
> 
> drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:16:9: warning: unknown
> option after '#pragma GCC diagnostic' kind [-Wpragmas]
>   #pragma GCC diagnostic ignored "-Wunused-const-variable"
>           ^
> In file included from drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:18:0:
> drivers/gpu/drm/msm/adreno/adreno_gen7_0_0_snapshot.h:924:19: warning:
> 'gen7_0_0_external_core_regs' defined but not used [-Wunused-variable]
>   static const u32 *gen7_0_0_external_core_regs[] = {
>                     ^
> In file included from drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:19:0:
> drivers/gpu/drm/msm/adreno/adreno_gen7_2_0_snapshot.h:748:19: warning:
> 'gen7_2_0_external_core_regs' defined but not used [-Wunused-variable]
>   static const u32 *gen7_2_0_external_core_regs[] = {
>                     ^
> In file included from drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:20:0:
> drivers/gpu/drm/msm/adreno/adreno_gen7_9_0_snapshot.h:1188:43: warning:
> 'gen7_9_0_sptp_clusters' defined but not used [-Wunused-variable]
>   static struct gen7_sptp_cluster_registers gen7_9_0_sptp_clusters[] = {
>                                             ^
> drivers/gpu/drm/msm/adreno/adreno_gen7_9_0_snapshot.h:1438:19: warning:
> 'gen7_9_0_external_core_regs' defined but not used [-Wunused-variable]
>   static const u32 *gen7_9_0_external_core_regs[] = {
> 
> Remove GCC version dependency by using __unused__ for the unused gen7_* includes.
> 
> Changes in v2:
> 	- Fix the warnings in the commit text
> 	- Use __attribute((__unused__)) instead of local assignment
> 
> changes in v3:
> 	- drop the Link from the auto add
> 
> Fixes: 64d6255650d4 ("drm/msm: More fully implement devcoredump for a7xx")
> Suggested-by: Rob Clark <robdclark@...omium.org>
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry