From: Michael Buesch <mb@bu3sch.de>
To: jt@hpl.hp.com
Cc: David Miller <davem@davemloft.net>,
shaddy_baddah@hotmail.com, linux-wireless@vger.kernel.org,
dsd@gentoo.org, johannes@sipsolutions.net
Subject: Re: zd1211rw (2.6.22 sparc64): unaligned access (do_rx)
Date: Thu, 6 Dec 2007 22:33:18 +0100 [thread overview]
Message-ID: <200712062233.18634.mb@bu3sch.de> (raw)
In-Reply-To: <20071206212525.GA6509@bougret.hpl.hp.com>
On Thursday 06 December 2007 22:25:25 Jean Tourrilhes wrote:
> On Wed, Dec 05, 2007 at 06:36:28PM -0800, David Miller wrote:
> > From: Jean Tourrilhes <jt@hpl.hp.com>
> > Date: Wed, 5 Dec 2007 13:56:00 -0800
> >
> > > Personally, I was under the impression that in userspace libc
> > > trap unaligned access and make them work. I mean, this code was tested
> > > on other 64/32 bit platforms (PPC, AMD-64, PS3) and was working there,
> > > so this seems to be specific to your platform.
> >
> > None of those listed platforms trap on unaligned accesses like sparc
> > does.
>
> Now, I'm wondering how to deal with unaligned access in
> userspace. If you get data from hardware or the network, you can not
> guarantee that everything will always be aligned, so we need a way to
> deal with it.
> In the kernel, we have get_unaligned(). I wonder what's the
> equivalent in userspace.
Userspace handles this transparently through fault traps.
--
Greetings Michael.
next prev parent reply other threads:[~2007-12-06 21:35 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-19 0:56 zd1211rw (2.6.22 sparc64): unaligned access (do_rx) Shaddy Baddah
2007-11-19 8:27 ` David Miller
2007-11-19 12:11 ` Shaddy Baddah
2007-11-19 12:19 ` David Miller
2007-11-21 13:08 ` Shaddy Baddah
2007-11-19 15:03 ` Johannes Berg
2007-11-19 18:04 ` Jean Tourrilhes
2007-11-21 13:18 ` Shaddy Baddah
2007-11-21 13:30 ` Shaddy Baddah
2007-11-21 14:23 ` Daniel Drake
2007-11-21 18:05 ` Kyle McMartin
2007-11-30 5:31 ` Shaddy Baddah
2007-11-21 14:33 ` Daniel Drake
2007-11-21 18:44 ` Jean Tourrilhes
2007-11-30 3:42 ` Shaddy Baddah
2007-11-30 20:21 ` Jean Tourrilhes
2007-12-04 0:01 ` Jean Tourrilhes
[not found] ` <4756AABC.3000204@hotmail.com>
[not found] ` <20071205215600.GA28349@bougret.hpl.hp.com>
2007-12-05 23:25 ` Shaddy Baddah
2007-12-05 23:40 ` Jean Tourrilhes
2007-12-06 21:59 ` Jean Tourrilhes
2007-12-06 2:36 ` David Miller
2007-12-06 21:25 ` Jean Tourrilhes
2007-12-06 21:33 ` Michael Buesch [this message]
2007-12-06 21:43 ` Jean Tourrilhes
2007-12-07 3:52 ` David Miller
2007-12-07 11:35 ` Michael Buesch
2007-12-07 12:34 ` David Miller
2007-12-07 13:36 ` Michael Buesch
2007-12-07 14:48 ` Daniel Drake
2007-12-08 1:36 ` David Miller
2007-12-08 1:35 ` David Miller
2007-12-08 11:21 ` Michael Buesch
2007-12-08 12:54 ` Daniel Drake
2007-12-07 3:50 ` David Miller
2007-12-07 3:49 ` David Miller
2007-11-19 22:20 ` David Miller
2007-11-19 22:35 ` Jean Tourrilhes
2007-11-20 7:42 ` David Miller
2007-11-20 17:43 ` Jean Tourrilhes
2007-11-20 21:56 ` David Miller
2007-11-20 12:40 ` Johannes Berg
2007-11-20 12:46 ` David Miller
[not found] ` <20071120180016.GC1480@bougret.hpl.hp.com>
2007-11-20 21:58 ` David Miller
2007-11-20 22:08 ` John W. Linville
2007-11-20 22:38 ` David Miller
2007-11-20 22:16 ` Jean Tourrilhes
2007-11-20 22:41 ` David Miller
[not found] ` <20071120180601.GA2019@bougret.hpl.hp.com>
[not found] ` <47443430.3010504@hotmail.com>
2007-11-21 19:06 ` Jean Tourrilhes
2007-11-20 17:38 ` Jean Tourrilhes
2007-11-20 12:34 ` David Miller
2007-11-20 13:15 ` Johannes Berg
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