linux-kernel - [PATCH] drm/tegra: mark t186 display hub PM functions __maybe

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Date:   Fri, 15 Dec 2017 13:51:52 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Jonathan Hunter <jonathanh@...dia.com>
Cc:     Arnd Bergmann <arnd@...db.de>, dri-devel@...ts.freedesktop.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/tegra: mark t186 display hub PM functions __maybe_unused

The newly introduced driver has optional suspend/resume functions,
causing a warning when CONFIG_PM is disabled:

drivers/gpu/drm/tegra/hub.c:749:12: error: 'tegra_display_hub_resume' defined but not used [-Werror=unused-function]
drivers/gpu/drm/tegra/hub.c:733:12: error: 'tegra_display_hub_suspend' defined but not used [-Werror=unused-function]

This marks them __maybe_unused to shut up the warnings.

Fixes: c4755fb9064f ("drm/tegra: Add Tegra186 display hub support")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/tegra/hub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index cccd44711d68..f4911feda9ff 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -730,7 +730,7 @@ static int tegra_display_hub_remove(struct platform_device *pdev)
 	return err;
 }
 
-static int tegra_display_hub_suspend(struct device *dev)
+static int __maybe_unused tegra_display_hub_suspend(struct device *dev)
 {
 	struct tegra_display_hub *hub = dev_get_drvdata(dev);
 	int err;
@@ -746,7 +746,7 @@ static int tegra_display_hub_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_display_hub_resume(struct device *dev)
+static int __maybe_unused tegra_display_hub_resume(struct device *dev)
 {
 	struct tegra_display_hub *hub = dev_get_drvdata(dev);
 	int err;
-- 
2.9.0