From: David Woodhouse <dwmw2@infradead.org>
To: Marcel Holtmann <marcel@holtmann.org>
Cc: Daryl Van Vorst <daryl@wideray.com>,
"'BlueZ Mailing List'" <bluez-devel@lists.sourceforge.net>
Subject: RE: [Bluez-devel] Alignment issue
Date: Thu, 12 Aug 2004 09:34:49 +0100 [thread overview]
Message-ID: <1092299689.4622.8.camel@imladris.demon.co.uk> (raw)
In-Reply-To: <1092252699.4564.238.camel@pegasus>
On Wed, 2004-08-11 at 21:31 +0200, Marcel Holtmann wrote:
> this is what the Linux kernel is using and we will notice it if some
> compiler version will optimize it in future. I committed that change to
> CVS.
The Linux kernel isn't the best example to follow when it comes to
relying on undocumented and unguaranteed compiler behaviour. Don't be so
sure the kernel would notice -- we have to fix up alignment trap in the
kernel _anyway_ so the use of get_unaligned() is only an optimisation
there.
I'd be more inclined to play with using char * pointers in the memcpy,
and/or __attribute__((packed)).
--
dwmw2
next prev parent reply other threads:[~2004-08-12 8:34 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-10 18:38 [Bluez-devel] Alignment issue Daryl Van Vorst
2004-08-10 23:12 ` Marcel Holtmann
2004-08-11 9:20 ` Stephen Crane
2004-08-11 11:08 ` David Woodhouse
2004-08-11 19:33 ` Marcel Holtmann
2004-08-11 7:13 ` Marcel Holtmann
2004-08-11 16:44 ` Daryl Van Vorst
2004-08-11 19:31 ` Marcel Holtmann
2004-08-12 8:34 ` David Woodhouse [this message]
2004-08-12 9:27 ` Marcel Holtmann
2004-08-12 10:01 ` David Woodhouse
2004-08-12 10:22 ` Marcel Holtmann
2004-08-12 10:35 ` David Woodhouse
2004-08-12 11:00 ` Marcel Holtmann
2004-08-12 11:33 ` David Woodhouse
2004-08-12 11:49 ` Marcel Holtmann
2004-08-12 12:02 ` David Woodhouse
2004-08-12 12:29 ` Marcel Holtmann
2004-08-12 13:36 ` Marcel Holtmann
2004-08-13 8:07 ` David Woodhouse
2004-08-13 9:05 ` Marcel Holtmann
2004-08-13 9:14 ` David Woodhouse
2004-08-13 11:52 ` David Woodhouse
2004-08-13 12:40 ` Marcel Holtmann
2004-08-12 12:53 ` David Woodhouse
2004-08-13 9:58 ` Marcel Holtmann
2004-08-13 10:56 ` David Woodhouse
2004-08-12 10:10 ` Stephen Crane
2004-08-12 10:25 ` Marcel Holtmann
2005-01-20 14:30 ` David Woodhouse
2005-01-20 14:45 ` Marcel Holtmann
2005-01-20 14:59 ` David Woodhouse
2005-01-20 18:14 ` Marcel Holtmann
2005-01-21 8:26 ` David Woodhouse
2005-01-23 8:12 ` Marcel Holtmann
2005-01-23 11:39 ` Marcel Holtmann
2005-01-23 12:29 ` David Woodhouse
2005-01-23 14:40 ` Marcel Holtmann
2005-01-23 15:11 ` David Woodhouse
2005-01-23 15:22 ` Marcel Holtmann
2005-01-23 23:16 ` David Woodhouse
-- strict thread matches above, loose matches on Subject: below --
2004-08-16 9:48 john smith
2004-08-16 10:15 ` Marcel Holtmann
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