[PATCH, RESEND] drm: exynos: avoid unused function warning

From: Arnd Bergmann
Date: Tue Sep 06 2016 - 09:30:52 EST


When CONFIG_PM is not set, we get a warning about an unused function:

drivers/gpu/drm/exynos/exynos_drm_gsc.c:1219:12: error: 'gsc_clk_ctrl' defined but not used [-Werror=unused-function]
static int gsc_clk_ctrl(struct gsc_context *ctx, bool enable)
^~~~~~~~~~~~

This removes the two #ifdef checks in this file and instead marks the
functions as __maybe_unused, which is a more reliable way of doing the
same, allowing better build coverage and avoiding the warning above.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_gsc.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

Originally sent on July 11, but I just got this again and noticed
it had never been applied, and I didn't get any reply for the patch.

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
index 5d20da8f957e..b0a773790f85 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
@@ -1760,8 +1760,7 @@ static int gsc_remove(struct platform_device *pdev)
return 0;
}

-#ifdef CONFIG_PM_SLEEP
-static int gsc_suspend(struct device *dev)
+static int __maybe_unused gsc_suspend(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);

@@ -1773,7 +1772,7 @@ static int gsc_suspend(struct device *dev)
return gsc_clk_ctrl(ctx, false);
}

-static int gsc_resume(struct device *dev)
+static int __maybe_unused gsc_resume(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);

@@ -1784,10 +1783,8 @@ static int gsc_resume(struct device *dev)

return 0;
}
-#endif

-#ifdef CONFIG_PM
-static int gsc_runtime_suspend(struct device *dev)
+static int __maybe_unused gsc_runtime_suspend(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);

@@ -1796,7 +1793,7 @@ static int gsc_runtime_suspend(struct device *dev)
return gsc_clk_ctrl(ctx, false);
}

-static int gsc_runtime_resume(struct device *dev)
+static int __maybe_unused gsc_runtime_resume(struct device *dev)
{
struct gsc_context *ctx = get_gsc_context(dev);

@@ -1804,7 +1801,6 @@ static int gsc_runtime_resume(struct device *dev)

return gsc_clk_ctrl(ctx, true);
}
-#endif

static const struct dev_pm_ops gsc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(gsc_suspend, gsc_resume)
--
2.9.0