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From: Arnd Bergmann <arnd@arndb.de>
To: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 07/15] Don't return -ENOSYS as extra notes size if spufs is not loaded
Date: Wed, 12 Sep 2007 13:04:57 +0200
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Cc: Michael Ellerman <michael@ellerman.id.au>, Jeremy Kerr <jk@ozlabs.org>,
       linux-kernel@vger.kernel.org
References: <2900ea4dbfd6e98e71ff400cbd25d1283a278972.1189583010.git.michael@ellerman.id.au> <628a383203480c3ce59125feccc32168de919014.1189583010.git.michael@ellerman.id.au>
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On Wednesday 12 September 2007, Michael Ellerman wrote:
> Because the SPU coredump code might be built as part of a module (spufs),
> we have a stub which is called by the coredump code, this routine then calls
> into spufs if it's loaded.
> 
> Unfortunately the stub returns -ENOSYS if spufs is not loaded, which is
> interpreted by the coredump code as an extra note size of -38 bytes. This
> leads to a corrupt core dump.
> 
> If spufs is not loaded there will be no SPU ELF notes to write, and so the
> extra notes size will be == 0.
> 
> Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
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