Re: [PATCH 6/6] blk-mq: manage hctx map via xarray

[Ming Lei <ming.lei@redhat.com>]

Hi,

Thanks for the report!

On Tue, Mar 01, 2022 at 01:57:33AM +0800, kernel test robot wrote:
> Hi Ming,
> 
> Thank you for the patch! Perhaps something to improve:
> 
> [auto build test WARNING on axboe-block/for-next]
> [also build test WARNING on v5.17-rc6 next-20220225]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
> 
> url:    https://github.com/0day-ci/linux/commits/Ming-Lei/blk-mq-update_nr_hw_queues-related-improvement-bugfix/20220228-170706
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
> config: i386-randconfig-a002-20220228 (https://download.01.org/0day-ci/archive/20220301/202203010133.JIpKpP2Z-lkp@intel.com/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/0day-ci/linux/commit/176e39bc0acb20f8fd869d170b429b7253b089c4
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Ming-Lei/blk-mq-update_nr_hw_queues-related-improvement-bugfix/20220228-170706
>         git checkout 176e39bc0acb20f8fd869d170b429b7253b089c4
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
>    In file included from block/blk-mq-debugfs-zoned.c:7:
> >> block/blk-mq-debugfs.h:24:14: warning: declaration of 'struct blk_mq_hw_ctx' will not be visible outside of this function [-Wvisibility]
>                                      struct blk_mq_hw_ctx *hctx);


The warning is nothing to do with this patchset.

You can trigger that by just changing modify time of include/linux/blkdev.h.

The following patch can fix the warning, and I will post one formal
patch soon.

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;


Thanks,
Ming