linux-kernel - Re: [PATCH] uuid: Add helpers for finding UUID from an array

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Message-ID: <20190827115418.GA5921@lst.de>
Date:   Tue, 27 Aug 2019 13:54:18 +0200
From:   Christoph Hellwig <hch@....de>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Christoph Hellwig <hch@....de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uuid: Add helpers for finding UUID from an array

On Tue, Aug 27, 2019 at 02:49:18PM +0300, Heikki Krogerus wrote:
> Matching function that compares every UUID in an array to a
> given UUID with guid_equal().
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
> Hi,
> 
> I don't have a user for these helpers, but since they are pretty
> trivial, I figured that might as well propose them in any case.
> Though, I think there was somebody proposing of doing the same thing
> that these helpers do at one point, but just the hard way in the
> drivers, right Andy?

XFS has something similar in xfs_uuid_mount, except that it also
tracks empty slots.  That beeing said I'm pretty sure if you ask willy
he's suggest to just convert the table to an xarray instead :)

So I'm defintively curious what the users would be where we just check
a table, but don't also add something to the table.