[PATCH] blk-mq: kill warning when building block/blk-mq-debugfs-zoned.c

[Ming Lei <ming.lei@xxxxxxxxxx>]

Fix the following warning when building block/blk-mq-debugfs-zoned.c:

In file included from block/blk-mq-debugfs-zoned.c:7:
block/blk-mq-debugfs.h:24:14: warning: ‘struct blk_mq_hw_ctx’ declared inside parameter list will not be visible outside of this definition or declaration
   24 |       struct blk_mq_hw_ctx *hctx);
      |              ^~~~~~~~~~~~~

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
 block/blk-mq-debugfs.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-mq-debugfs.h b/block/blk-mq-debugfs.h
index a68aa6041a10..37fe2716e96e 100644
--- a/block/blk-mq-debugfs.h
+++ b/block/blk-mq-debugfs.h
@@ -5,6 +5,7 @@
 #ifdef CONFIG_BLK_DEBUG_FS
 
 #include <linux/seq_file.h>
+#include <linux/blk-mq.h>
 
 struct blk_mq_debugfs_attr {
 	const char *name;
-- 
2.31.1