drivers/block/mg_disk.c: add CONFIG_PM_SLEEP to suspend/resume functions

Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following build
warning when CONFIG_PM_SLEEP is not selected.  This is because sleep PM
callbacks defined by SIMPLE_DEV_PM_OPS are only used when the
CONFIG_PM_SLEEP is enabled.

drivers/block/mg_disk.c:783:12: warning: 'mg_suspend' defined but not used [-Wunused-function]
drivers/block/mg_disk.c:807:12: warning: 'mg_resume' defined but not used [-Wunused-function]

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index 1788f491e0fb..532bb8935a57 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -780,6 +780,7 @@ static const struct block_device_operations mg_disk_ops = {
         .getgeo = mg_getgeo
 };
 
+#ifdef CONFIG_PM_SLEEP
 static int mg_suspend(struct device *dev)
 {
         struct mg_drv_data *prv_data = dev->platform_data;
@@ -824,6 +825,7 @@ static int mg_resume(struct device *dev)
 
         return 0;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(mg_pm, mg_suspend, mg_resume);