linux-kernel - Re: [PATCH 07/15] Don't return -ENOSYS as extra notes size if spufs is not loaded

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Message-Id: <200709121304.58140.arnd@arndb.de>
Date:	Wed, 12 Sep 2007 13:04:57 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linuxppc-dev@...abs.org
Cc:	Michael Ellerman <michael@...erman.id.au>,
	Jeremy Kerr <jk@...abs.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/15] Don't return -ENOSYS as extra notes size if spufs is not loaded

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@...erman.id.au>

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