linux-kernel - Re: linux-next: build failure after merge of the block tree

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Date:   Tue, 8 Mar 2022 19:33:08 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the block tree

On 3/8/22 7:16 PM, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the block tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> In file included from block/blk-mq-debugfs-zoned.c:7:
> block/blk-mq-debugfs.h:24:42: error: 'struct blk_mq_hw_ctx' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
>    24 |                                   struct blk_mq_hw_ctx *hctx);
>       |                                          ^~~~~~~~~~~~~
> block/blk-mq-debugfs.h:25:44: error: 'struct blk_mq_hw_ctx' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
>    25 | void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
>       |                                            ^~~~~~~~~~~~~
> block/blk-mq-debugfs.h:32:47: error: 'struct blk_mq_hw_ctx' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
>    32 |                                        struct blk_mq_hw_ctx *hctx);
>       |                                               ^~~~~~~~~~~~~
> block/blk-mq-debugfs.h:33:50: error: 'struct blk_mq_hw_ctx' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
>    33 | void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
>       |                                                  ^~~~~~~~~~~~~
> cc1: all warnings being treated as errors

It just needs a forward declaration. I'll fix it up.

-- 
Jens Axboe