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Date:	Wed, 15 Dec 2010 19:22:48 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	penguin-kernel@...ove.SAKURA.ne.jp, netdev@...r.kernel.org
Subject: Re: [2.6.37-rc5] Build error on parisc.

Le mercredi 15 décembre 2010 à 10:19 -0800, David Miller a écrit :
> From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> Date: Wed, 15 Dec 2010 17:01:14 +0900
> 
> > [2.6.37-rc5] Build error on parisc.
> > 
> > Commit 5635c10d "net: make sure struct dst_entry refcount is aligned on 64 bytes"
> > uses manual padding. I triggered BUILD_BUG_ON() when using
> > http://kernel.org/pub/tools/crosstool/files/bin/i686/4.5.1/i686-gcc-4.5.1-nolibc_hppa64-linux.tar.bz2 .
> > 
> >   make -s CROSS_COMPILE=hppa64-linux- ARCH=parisc
> > 
> >   include/net/dst.h: In function 'dst_hold':
> >   include/net/dst.h:161:2: error: negative width in bit-field '<anonymous>'
> > 
> > I think below patch can fix the error but that commit says that we cannot use
> > __atribute((aligned)). Why?
> 
> We don't want to create holes of unused space in the structure, we want
> to know exactly how every byte of space is being used so nothing is
> wasted when all features are enabed.

Yes, sorry for missing your mail Tetsuo.



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