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SubjectRe: [RFC 1/3] block: move main block debugfs initialization to its own file
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On 2020-04-01 17:00, Luis Chamberlain wrote:
> Single and multiqeueue block devices share some debugfs code. By
^^^^^^^^^^^
multiqueue?
> moving this into its own file it makes it easier to expand and audit
> this shared code.

[ ... ]

> diff --git a/block/blk-debugfs.c b/block/blk-debugfs.c
> new file mode 100644
> index 000000000000..634dea4b1507
> --- /dev/null
> +++ b/block/blk-debugfs.c
> @@ -0,0 +1,15 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/*
> + * Shared debugfs mq / non-mq functionality
> + */

The legacy block layer is gone, so not sure why the above comment refers
to non-mq?

> diff --git a/block/blk.h b/block/blk.h
> index 0a94ec68af32..86a66b614f08 100644
> --- a/block/blk.h
> +++ b/block/blk.h
> @@ -487,5 +487,12 @@ struct request_queue *__blk_alloc_queue(int node_id);
> int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
> struct page *page, unsigned int len, unsigned int offset,
> bool *same_page);
> +#ifdef CONFIG_DEBUG_FS
> +void blk_debugfs_register(void);
> +#else
> +static inline void blk_debugfs_register(void)
> +{
> +}
> +#endif /* CONFIG_DEBUG_FS */

Do we really need a new header file that only declares a single
function? How about adding the above into block/blk-mq-debugfs.h?

Thanks,

Bart.

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