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Date:   Mon, 11 Apr 2022 08:56:07 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Tiezhu Yang <yangtiezhu@loongson.cn>
Cc:     Jens Axboe <axboe@kernel.dk>, Jonathan Corbet <corbet@lwn.net>,
        linux-block@vger.kernel.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] docs: kernel-parameters: update description of root=
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On Sat, Apr 09, 2022 at 11:39:40AM +0800, Tiezhu Yang wrote:
> root=UUID or root=LABEL is not supported without initrd.
> It is better to update description of root= to explicitly
> tell the users.

These are not supported at all by the kernel.  Maybe some code running
in an initramfs might do some magic with these, but they have no meaning
for the kernel and shouldn't really be documented here.