2024-06-05 18:34:51

by Abhinav Kumar

Subject: [PATCH v4] drm/msm/a6xx: use __unused__ to fix compiler warnings for gen7_* includes

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

changes in v4:
- replace __attribute((__unused__)) with __always_unused

Fixes: 64d6255650d4 ("drm/msm: More fully implement devcoredump for a7xx")
Suggested-by: Rob Clark <[email protected]>
Signed-off-by: Abhinav Kumar <[email protected]>
---
drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index 0a7717a4fc2f..59a4eb942b9b 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -8,19 +8,15 @@
#include "a6xx_gpu_state.h"
#include "a6xx_gmu.xml.h"

-/* Ignore diagnostics about register tables that we aren't using yet. We don't
- * want to modify these headers too much from their original source.
- */
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-variable"
-#pragma GCC diagnostic ignored "-Wunused-const-variable"
+static const unsigned int *gen7_0_0_external_core_regs[] __always_unused;
+static const unsigned int *gen7_2_0_external_core_regs[] __always_unused;
+static const unsigned int *gen7_9_0_external_core_regs[] __always_unused;
+static struct gen7_sptp_cluster_registers gen7_9_0_sptp_clusters[] __always_unused;

#include "adreno_gen7_0_0_snapshot.h"
#include "adreno_gen7_2_0_snapshot.h"
#include "adreno_gen7_9_0_snapshot.h"

-#pragma GCC diagnostic pop
-
struct a6xx_gpu_state_obj {
const void *handle;
u32 *data;
--
2.44.0

2024-06-06 15:45:02

by Dmitry Baryshkov

Subject: Re: [PATCH v4] drm/msm/a6xx: use __unused__ to fix compiler warnings for gen7_* includes

On Wed, Jun 05, 2024 at 11:34:15AM -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
>
> changes in v4:
> - replace __attribute((__unused__)) with __always_unused
>
> Fixes: 64d6255650d4 ("drm/msm: More fully implement devcoredump for a7xx")
> Suggested-by: Rob Clark <[email protected]>
> Signed-off-by: Abhinav Kumar <[email protected]>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 12 ++++--------
> 1 file changed, 4 insertions(+), 8 deletions(-)
>

Reviewed-by: Dmitry Baryshkov <[email protected]>


--
With best wishes
Dmitry