On 30/03/2022 21:05, Nathan Chancellor wrote:
When building with CONFIG_PM=y and CONFIG_PM_SLEEP=n (such as ARCH=riscv
allmodconfig), the following warnings/errors occur:
drivers/gpu/drm/msm/adreno/adreno_device.c:679:12: error: 'adreno_system_resume' defined but not used [-Werror=unused-function]
679 | static int adreno_system_resume(struct device *dev)
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/msm/adreno/adreno_device.c:655:12: error: 'adreno_system_suspend' defined but not used [-Werror=unused-function]
655 | static int adreno_system_suspend(struct device *dev)
| ^~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
These functions are only used in SET_SYSTEM_SLEEP_PM_OPS(), which
evaluates to empty when CONFIG_PM_SLEEP is not set, making these
functions unused.
Traditionally, these functions are marked as __maybe_unused but in this
case, there is already an '#ifdef CONFIG_PM' in the code, so just do the
same thing with CONFIG_PM_SLEEP to resolve the warning.
Fixes: 7e4167c9e021 ("drm/msm/gpu: Park scheduler threads for system suspend")
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
I'd suggest using __maybe_unused instead (and maybe even sending the
followup patch changing the #ifdef CONFIG_PM to __maybe_unused too):
If the code is included into the compilation, it means it's more widely
compile tested. Which tends to reveal obscure bugs, dependencies, etc.
---
drivers/gpu/drm/msm/adreno/adreno_device.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 661dfa7681fb..b25915230bab 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -621,6 +621,7 @@ static int adreno_runtime_suspend(struct device *dev)
return gpu->funcs->pm_suspend(gpu);
}
+#ifdef CONFIG_PM_SLEEP
static void suspend_scheduler(struct msm_gpu *gpu)
{
int i;
@@ -681,8 +682,8 @@ static int adreno_system_resume(struct device *dev)
resume_scheduler(dev_to_gpu(dev));
return pm_runtime_force_resume(dev);
}
-
-#endif
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
static const struct dev_pm_ops adreno_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(adreno_system_suspend, adreno_system_resume)
base-commit: 05241de1f69eb7f56b0a5e0bec96a7752fad1b2f
--
With best wishes
Dmitry
