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From: Artem Bityutskiy <dedekind@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH] ubi: kill homegrown endian macros
Date: Thu, 17 May 2007 20:46:46 +0300	[thread overview]
Message-ID: <1179424006.3642.84.camel@sauron> (raw)
In-Reply-To: <20070517102931.6bbbad1a.akpm@linux-foundation.org>

On Thu, 2007-05-17 at 10:29 -0700, Andrew Morton wrote:
> umm..  I'd say what you've done in there is an improvement to the exiting
> stuff: getting gcc to check it is better than having to use sparse.
> 
> I'd have expected gcc to generate poorer code with your approach but I'm
> showing zero text size changes from Christoph's patch (gcc-4.1 and
> gcc-3.4.5).
> 
> So I wouldn't be averse to creating a new, generic, kernel-wide alternative
> to the existing __be32/__le32/etc code.  It is an improvement.
> 
> We could conceivably simply switch the existing stuff to use structs, but
> quite a lot of code assumes that cpu_to_foo32(0) == 0 and just does
> open-coded assigments of zero.  They'd need fixups.

Andrew,

thanks for answer. I personally do not think this should be applied
before we have better __be32 and friends. Thus, if I can do so, I will
just sit and wait for your decision - whether you include this patch to
-mm or not :-) .

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)


  reply	other threads:[~2007-05-17 17:54 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-17 14:32 [PATCH] ubi: kill homegrown endian macros Christoph Hellwig
2007-05-17 14:50 ` Artem Bityutskiy
2007-05-17 14:56   ` Christoph Hellwig
2007-05-17 15:09     ` Artem Bityutskiy
2007-05-17 17:29       ` Andrew Morton
2007-05-17 17:46         ` Artem Bityutskiy [this message]
2007-05-17 18:18           ` Andrew Morton
2007-05-17 20:32             ` Artem Bityutskiy
2007-05-17 20:30         ` Matthieu CASTET
2007-05-18  2:39           ` David Woodhouse
2007-05-18  2:57             ` John Anthony Kazos Jr.
2007-05-18  3:17               ` David Woodhouse
2007-05-18 11:52                 ` John Anthony Kazos Jr.
2007-05-18 14:52                   ` David Woodhouse
2007-05-18 22:00                     ` Segher Boessenkool
2007-05-19  2:07                       ` David Woodhouse
2007-05-19 12:24                         ` Segher Boessenkool
2007-05-20 11:29                           ` David Woodhouse
2007-05-18 19:55             ` matthieu castet
2007-05-19  1:29               ` David Woodhouse
2007-05-18 20:30             ` matthieu castet
2007-05-17 20:42         ` Al Viro
2007-05-17 20:53           ` Al Viro
2007-05-18  6:58             ` Artem Bityutskiy
2007-05-18  8:38               ` Al Viro
2007-05-17 21:14           ` Dmitry Torokhov
2007-05-17 21:29             ` Al Viro
2007-05-17 21:33             ` David Miller
2007-05-17 21:47               ` Al Viro
2007-05-17 21:26           ` Al Viro
2007-05-17 20:56   ` David Miller
2007-05-17 21:03     ` Al Viro
2007-05-17 15:50 ` David Woodhouse
2007-05-17 18:12   ` Christoph Hellwig
2007-05-17 18:23     ` Sam Ravnborg
2007-05-17 18:36       ` Christoph Hellwig
2007-05-17 20:18         ` Jeremy Fitzhardinge
2007-05-17 20:27 ` Matthieu CASTET

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