[Qemu-block] [PATCH] block: Constify data passed by pointer to blk_name

[Krzysztof Kozlowski]

blk_name() is not modifying data passed to it through pointer and it
returns also a pointer to const so the argument can be made const for
code safeness.

Signed-off-by: Krzysztof Kozlowski <address@hidden>
---
 block/block-backend.c          | 2 +-
 include/sysemu/block-backend.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/block-backend.c b/block/block-backend.c
index daa7908d0151..2d2169a5dfb0 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -409,7 +409,7 @@ void monitor_remove_blk(BlockBackend *blk)
  * Return @blk's name, a non-null string.
  * Returns an empty string iff @blk is not referenced by the monitor.
  */
-const char *blk_name(BlockBackend *blk)
+const char *blk_name(const BlockBackend *blk)
 {
     return blk->name ?: "";
 }
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 096c17fce064..d16c85d67b5c 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -91,7 +91,7 @@ int blk_get_refcnt(BlockBackend *blk);
 void blk_ref(BlockBackend *blk);
 void blk_unref(BlockBackend *blk);
 void blk_remove_all_bs(void);
-const char *blk_name(BlockBackend *blk);
+const char *blk_name(const BlockBackend *blk);
 BlockBackend *blk_by_name(const char *name);
 BlockBackend *blk_next(BlockBackend *blk);
 bool monitor_add_blk(BlockBackend *blk, const char *name, Error **errp);
-- 
2.9.3