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From: Christoph Hellwig <hch@infradead.org>
To: Praveen Kumar <kumarpraveen@linux.microsoft.com>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	axboe@kernel.dk
Subject: Re: [PATCH] blk-mq: export blk_mq_submit_bio symbol
Date: Thu, 9 Sep 2021 06:48:00 +0100	[thread overview]
Message-ID: <YTmgEAEx69PR/RMy@infradead.org> (raw)
In-Reply-To: <20210909053653.144360-1-kumarpraveen@linux.microsoft.com>

On Thu, Sep 09, 2021 at 11:06:53AM +0530, Praveen Kumar wrote:
> There are use-cases like replication where need to hook the blk I/O
> operations for devices and perform specific operation and fallback to
> its original I/O operations.
> Prior to v5.9 there was make_request_fn and then blk_mq_submit_bio
> exported apis, which provided infrastructure to drivers to develop these
> features. However in v5.10-rc1 with below commit the API was removed
> from the export list.
> 
> Previous commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.10-rc1&id=681cc5e8667e8579a2da8fa4090c48a2d73fc3bb
> 
> This patch exports the blk_mq_submit_bio symbol to provide flexibility
> to the drivers.

Please send your users of this "feature" to this list for inclusion
and we'll help you to massage them into a non-broken version.

And yes, you should have gotten the memo by now that we don't export
anything for out of tree modules.

  reply	other threads:[~2021-09-09  5:48 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-09  5:36 [PATCH] blk-mq: export blk_mq_submit_bio symbol Praveen Kumar
2021-09-09  5:48 ` Christoph Hellwig [this message]
2021-09-10 11:54   ` Praveen Kumar
2021-09-09 16:16 ` Chaitanya Kulkarni
2021-09-13  4:24   ` Praveen Kumar
2021-09-13  6:09     ` Christoph Hellwig
2021-09-13  7:03       ` Praveen Kumar
2021-09-20  5:30         ` Prasad Muppana
2021-09-20 20:25           ` Chaitanya Kulkarni
2021-09-22  5:45             ` Prasad Muppana
2021-09-22 14:29               ` Jens Axboe

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