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Date:   Sat, 7 Mar 2020 12:31:33 -0800
From:   Matthew Wilcox <>
To:     Stephen Kitt <>
Cc:     Jens Axboe <>, Jan Kara <>,,
Subject: Re: [PATCH v2] Document genhd capability flags

On Sat, Mar 07, 2020 at 03:56:59PM +0100, Stephen Kitt wrote:
> The kernel documentation includes a brief section about genhd
> capabilities, but it turns out that the only documented
> capability (GENHD_FL_MEDIA_CHANGE_NOTIFY) isn't used any more.
> This patch removes that flag, and documents the rest, based on my
> understanding of the current uses of these flags in the kernel. The
> documentation is kept in the header file, alongside the declarations,
> in the hope that it will be kept up-to-date in future; the kernel
> documentation is changed to include the documentation generated from
> the header file.
> Because the ultimate goal is to provide some end-user
> documentation (or end-administrator documentation), the comments are
> perhaps more user-oriented than might be expected. Since the values
> are shown to users in hexadecimal, the documentation lists them in
> hexadecimal, and the constant declarations are adjusted to match.
> Signed-off-by: Stephen Kitt <>

Reviewed-by: Matthew Wilcox (Oracle) <>

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