[PATCH V2] blk-mq: kill warning when building block/blk-mq-debugfs-zoned.c

Ming Lei
2022-03-02T00:34:50Z

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);
| ^~~~~~~~~~~~~

Cc: Christoph Hellwig <hch@lst.de>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
V2:
- forward declaration of struct blk_mq_hw_ctx instead of including
header, as suggested by Christoph

block/blk-mq-debugfs.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/block/blk-mq-debugfs.h b/block/blk-mq-debugfs.h
index a68aa6041a10..361d759c6fad 100644
--- a/block/blk-mq-debugfs.h
+++ b/block/blk-mq-debugfs.h
@@ -2,6 +2,8 @@
#ifndef INT_BLK_MQ_DEBUGFS_H
#define INT_BLK_MQ_DEBUGFS_H

+struct blk_mq_hw_ctx;
+
#ifdef CONFIG_BLK_DEBUG_FS

#include <linux/seq_file.h>
--
2.31.1