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Date:   Wed, 1 Dec 2021 23:20:53 -0800
From:   Christoph Hellwig <hch@infradead.org>
To:     Roberto Sassu <roberto.sassu@huawei.com>
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Subject: Re: [RFC][PATCH] device mapper: Add builtin function dm_get_status()
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On Wed, Dec 01, 2021 at 05:37:08PM +0100, Roberto Sassu wrote:
> Users of the device mapper driver might want to obtain a device status,
> with status types defined in the status_type_t enumerator.

The patch looks really odd.  And without the corresponding user of your
new functionality it is entirely unreviewable anyway.