[PATCH]mmc: core: check PM_SLEEP for mmc_bus_suspend/resume callbacks

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If PM_SLEEP is not enabled, mmc.c will give warnning since mmc_bus_suspend/
mmc_bus_resume functions are defined but not used. This patch can fix this
warnning.

Found-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
---
 drivers/mmc/core/bus.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index c60cee9..9b68933 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -122,6 +122,7 @@ static int mmc_bus_remove(struct device *dev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int mmc_bus_suspend(struct device *dev)
 {
 	struct mmc_driver *drv = to_mmc_driver(dev->driver);
@@ -143,6 +144,7 @@ static int mmc_bus_resume(struct device *dev)
 		ret = drv->resume(card);
 	return ret;
 }
+#endif
 
 #ifdef CONFIG_PM_RUNTIME
 
-- 
1.7.1

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