From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Gabriel Paubert <paubert@iram.es>
Cc: Wrobel Heinz-R39252 <r39252@freescale.com>,
Michael Ellerman <michael@ellerman.id.au>,
Steffen Rumler <steffen.rumler.ext@nsn.com>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
Subject: Re: kernel panic during kernel module load (powerpc specific part)
Date: Wed, 06 Jun 2012 08:14:55 +1000 [thread overview]
Message-ID: <1338934495.7150.112.camel@pasglop> (raw)
In-Reply-To: <20120605113225.GA11215@visitor2.iram.es>
On Tue, 2012-06-05 at 13:32 +0200, Gabriel Paubert wrote:
> - gcc-4.6 and gcc-4.7 behave identically, if -Os is set, they
> generate by default lmw/stmw. But if I combine -Os with
> -mno-multiple, they call the helper functions.
>
> In other words, on this system, gcc-4.4 is broken but should not
> cause any harm. gcc-4.6 and gcc-4.7 look correct, but are there
> any processors on which -mno-multiple is worth setting?
It could be an artifact of the -mtune we use, dunno. And yes, I'm pretty
sure some embedded processors don't like multiple load/store.
Cheers,
Ben.
next prev parent reply other threads:[~2012-06-05 22:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-30 14:33 kernel panic during kernel module load (powerpc specific part) Steffen Rumler
2012-05-30 23:24 ` Michael Ellerman
2012-05-31 7:04 ` Wrobel Heinz-R39252
2012-05-31 11:04 ` Gabriel Paubert
2012-06-01 9:18 ` Benjamin Herrenschmidt
2012-06-01 11:33 ` Wrobel Heinz-R39252
2012-06-04 7:43 ` Steffen Rumler
2012-06-04 10:53 ` Paul Mackerras
2012-06-04 11:03 ` Gabriel Paubert
2012-06-04 22:00 ` Benjamin Herrenschmidt
2012-06-05 10:44 ` Gabriel Paubert
2012-06-05 22:47 ` Benjamin Herrenschmidt
2012-06-05 11:32 ` Gabriel Paubert
2012-06-05 22:14 ` Benjamin Herrenschmidt [this message]
2012-06-06 7:36 ` Steffen Rumler
2012-06-06 11:32 ` Benjamin Herrenschmidt
2012-06-06 14:37 ` [PATCH] " Steffen Rumler
2012-06-21 15:27 ` roger blofeld
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