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[2/2] iommu/mediatek: mark PM functions as __maybe_unused

Message ID 1456737553-496245-2-git-send-email-arnd@arndb.de
State Accepted
Commit fd99f796a20b1a805c80ee51d7349d65103e7aaf
Headers show
Series [1/2] iommu/mediatek: select ARM_DMA_USE_IOMMU | expand

Commit Message

Arnd Bergmann Feb. 29, 2016, 9:19 a.m. UTC 
When CONFIG_PM is unset, we get a harmless warning for this driver:

drivers/iommu/mtk_iommu.c:665:12: error: 'mtk_iommu_suspend' defined but not used [-Werror=unused-function]
drivers/iommu/mtk_iommu.c:680:12: error: 'mtk_iommu_resume' defined but not used [-Werror=unused-function]

Marking the functions as __maybe_unused gits rid of the two functions
and lets the compiler silently drop the object code, while still
doing syntax checking on them for build-time verification.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Fixes: 0df4fabe208d ("iommu/mediatek: Add mt8173 IOMMU driver")
---
 drivers/iommu/mtk_iommu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.7.0
diff mbox series

Patch

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 721ffdb296d6..f3c160e4c25d 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -662,7 +662,7 @@  static int mtk_iommu_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int mtk_iommu_suspend(struct device *dev)
+static int __maybe_unused mtk_iommu_suspend(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
 	struct mtk_iommu_suspend_reg *reg = &data->reg;
@@ -677,7 +677,7 @@  static int mtk_iommu_suspend(struct device *dev)
 	return 0;
 }
 
-static int mtk_iommu_resume(struct device *dev)
+static int __maybe_unused mtk_iommu_resume(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
 	struct mtk_iommu_suspend_reg *reg = &data->reg;