drm/msm/gpu: Avoid -Wunused-function with !CONFIG_PM_SLEEP

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.

To resolve this, use the SYSTEM_SLEEP_PM_OPS() and RUNTIME_PM_OPS()
macros, which were introduced in commit 1a3c7bb08826 ("PM: core: Add new
*_PM_OPS macros, deprecate old ones"). They are designed to avoid these
compiler warnings while still guarding their use on
CONFIG_PM{,_SLEEP}=y.

Fixes: 7e4167c9e021 ("drm/msm/gpu: Park scheduler threads for system suspend")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20220411181249.2758344-1-nathan@kernel.org
Signed-off-by: Rob Clark <robdclark@chromium.org>

diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 661dfa7681fb3c284bdddb15b53ae03d567a25d2..8706bcdd1472e6c8e0371238e1efb53aedc04cd0 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -599,7 +599,6 @@ static const struct of_device_id dt_match[] = {
        {}
 };
 
-#ifdef CONFIG_PM
 static int adreno_runtime_resume(struct device *dev)
 {
        struct msm_gpu *gpu = dev_to_gpu(dev);
@@ -682,11 +681,9 @@ static int adreno_system_resume(struct device *dev)
        return pm_runtime_force_resume(dev);
 }
 
-#endif
-
 static const struct dev_pm_ops adreno_pm_ops = {
-       SET_SYSTEM_SLEEP_PM_OPS(adreno_system_suspend, adreno_system_resume)
-       SET_RUNTIME_PM_OPS(adreno_runtime_suspend, adreno_runtime_resume, NULL)
+       SYSTEM_SLEEP_PM_OPS(adreno_system_suspend, adreno_system_resume)
+       RUNTIME_PM_OPS(adreno_runtime_suspend, adreno_runtime_resume, NULL)
 };
 
 static struct platform_driver adreno_driver = {