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Message-Id: <200910010207.45514.laurent.pinchart@ideasonboard.com>
Date: Thu, 1 Oct 2009 02:07:45 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Huang Ying <ying.huang@...el.com>
Cc: Joe Perches <joe@...ches.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Adrian Hunter <adrian.hunter@...ia.com>,
Alex Elder <aelder@....com>,
Artem Bityutskiy <dedekind@...radead.org>,
Christoph Hellwig <hch@....de>,
Harvey Harrison <harvey.harrison@...il.com>,
Ingo Molnar <mingo@...e.hu>, Jeff Garzik <jgarzik@...hat.com>,
Matt Mackall <mpm@...enic.com>,
Mauro Carvalho Chehab <mchehab@...radead.org>,
Neil Brown <neilb@...e.de>,
Steven Whitehouse <swhiteho@...hat.com>,
"xfs-masters@....sgi.com" <xfs-masters@....sgi.com>,
Andi Kleen <andi@...stfloor.org>, Greg KH <greg@...ah.com>
Subject: Re: [PATCH 0/9] Add vsprintf extension %pU to print UUID/GUIDs and use it
On Tuesday 29 September 2009 07:57:32 Huang Ying wrote:
> Hi, Joe,
>
> Thanks for the patch. I think that is a good idea.
>
> For your patch. I think you need a changelog for each patch.
>
> It seems that the binary representation of UUID can be little-endian
> (used by most kernel components) or big-endian (defined by RFC4122, used
> in network?). Maybe we should consider about that.
I think that's what the 'r' option is supposed to handle. Maybe you could use
'b' and 'l' options instead, to specify the endianness explicitly.
> In fact, I find there are many different UUID/GUID definitions in
> kernel, such as that in efi, many file systems, some drivers, etc. It
> seems that every kernel components need UUID/GUID has its own
> definition, so I think we should unify all the UUID/GUID definitions in
> kernel too. The file attached is a draft unified UUID/GUID definition,
> with byte-order issue in mind.
>
> Any comment?
Not much, it would help if you could show where those functions would be used.
I would also use the 'le' and 'be' prefixes (as in le16, be32) instead of 'l'
and 'b', making it leuuid and beuuid, or maybe uuid_le and uuid_be.
--
Regards,
Laurent Pinchart
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