[PATCH 01/10] block: have cdev_get_block_device accept const cdev

[Ahmad Fatoum]

Having a non-const cdev parameter for cdev_get_block_device() limits its
use as a user may want to just read struct block_device members without
change. Allow this by changing parameter to be pointer to const instead.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 common/block.c  | 2 +-
 include/block.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/common/block.c b/common/block.c
index 19bb81df2c3d..6290a45b7c46 100644
--- a/common/block.c
+++ b/common/block.c
@@ -361,7 +361,7 @@ static struct cdev_operations block_ops = {
 	.discard_range = block_op_discard_range,
 };
 
-struct block_device *cdev_get_block_device(struct cdev *cdev)
+struct block_device *cdev_get_block_device(const struct cdev *cdev)
 {
 	if (!cdev || cdev->ops != &block_ops)
 		return NULL;
diff --git a/include/block.h b/include/block.h
index 1fb40e942f9f..8740a03d36bc 100644
--- a/include/block.h
+++ b/include/block.h
@@ -50,9 +50,9 @@ static inline int block_flush(struct block_device *blk)
 }
 
 #ifdef CONFIG_BLOCK
-struct block_device *cdev_get_block_device(struct cdev *cdev);
+struct block_device *cdev_get_block_device(const struct cdev *cdev);
 #else
-static inline struct block_device *cdev_get_block_device(struct cdev *cdev)
+static inline struct block_device *cdev_get_block_device(const struct cdev *cdev)
 {
 	return NULL;
 }
-- 
2.30.2