From: Stephen Hemminger <stephen@networkplumber•org>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: Alan Modra <amodra@gmail•com>, netdev <netdev@vger•kernel.org>,
Ambrose Feinstein <ambrose@google•com>,
Paul Mackerras <paulus@samba•org>,
Anton Blanchard <anton@samba•org>,
linuxppc-dev@lists•ozlabs.org, David Miller <davem@davemloft•net>
Subject: Re: [PATCH net-next] af_unix: fix a fatal race with bit fields
Date: Wed, 1 May 2013 08:10:54 -0700 [thread overview]
Message-ID: <20130501081054.267a7851@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <1367384672.11020.34.camel@edumazet-glaptop>
On Tue, 30 Apr 2013 22:04:32 -0700
Eric Dumazet <eric.dumazet@gmail•com> wrote:
> On Wed, 2013-05-01 at 13:24 +0930, Alan Modra wrote:
> > On Tue, Apr 30, 2013 at 07:24:20PM -0700, Eric Dumazet wrote:
> > > li 11,1
> > > ld 0,0(9)
> > > rldimi 0,11,31,32
> > > std 0,0(9)
> > > blr
> > > .ident "GCC: (GNU) 4.6.3"
> > >
> > > You can see "ld 0,0(9)" is used : its a 64 bit load.
> >
> > Yup. This is not a powerpc64 specific problem. See
> > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52080
> > Fixed in 4.8.0 and 4.7.3.
>
> Ah thanks.
>
> This seems a pretty serious issue, is it documented somewhere that
> ppc64, sparc64 and others need such compiler version ?
>
> These kind of errors are pretty hard to find, its a pity to spend time
> on them.
There is a checkbin target inside arch/powerpc/Makefile
Shouldn't a check be added there to block building kernel with known
bad GCC versions?
next prev parent reply other threads:[~2013-05-01 15:11 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-01 1:12 [PATCH net-next] af_unix: fix a fatal race with bit fields Eric Dumazet
2013-05-01 1:39 ` Benjamin Herrenschmidt
2013-05-01 7:36 ` David Miller
2013-05-01 8:08 ` Benjamin Herrenschmidt
2013-05-01 15:24 ` [PATCH v2 " Eric Dumazet
2013-05-01 15:53 ` David Laight
2013-05-01 16:00 ` Eric Dumazet
2013-05-01 19:14 ` David Miller
2013-05-01 12:08 ` [PATCH " Ben Hutchings
2013-05-03 14:29 ` David Laight
2013-05-03 15:02 ` Eric Dumazet
2013-05-03 15:44 ` David Laight
2013-05-01 1:51 ` Anton Blanchard
2013-05-01 2:24 ` Eric Dumazet
2013-05-01 3:54 ` Alan Modra
2013-05-01 5:04 ` Eric Dumazet
2013-05-01 15:10 ` Stephen Hemminger [this message]
2013-05-02 21:11 ` Benjamin Herrenschmidt
2013-05-03 1:31 ` Alan Modra
2013-05-03 8:20 ` David Laight
2013-05-03 12:57 ` Benjamin Herrenschmidt
2013-05-03 14:14 ` Eric Dumazet
2013-05-02 17:02 ` Scott Wood
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