From: David Woodhouse <dwmw2@infradead.org>
To: "Demke, Torsten" <Torsten.Demke@fci.com>
Cc: linuxppc-embedded <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: dma_alloc_init badness ??
Date: Tue, 20 Jul 2004 18:00:57 -0400 [thread overview]
Message-ID: <1090360857.9473.7.camel@localhost.localdomain> (raw)
In-Reply-To: <9CFB9DA5261CD611A29B00508B7890480B842F73@ex-deu-munich02.force.de>
On Tue, 2004-07-20 at 13:26 +0200, Demke, Torsten wrote:
> Hello all,
>
> Im currently porting our application from 2.4.22 to 2.6.
> CPU is MPC852T and the bootloader is u-boot.
>
> The kernel boot prints a warning in dma_alloc_init,
> but Im not sure what that exactly means, and how to solve
> the problem:(
> Can anybody here please give me some help?
...
> Badness in dma_alloc_init at arch/ppc/kernel/dma-mapping.c:342
The warning at line 342 of dma-mapping.c is:
WARN_ON(!pmd_none(*pmd));
It's bitching that there's already a page table entry at the virtual
address you've given as CONFIG_CONSISTENT_START. The range specified by
CONFIG_CONSISTENT_START and CONFIG_CONSISTENT_SIZE must be a range of
_virtual_ addresses which are unused in your kernel.
--
dwmw2
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2004-07-20 22:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-20 11:26 dma_alloc_init badness ?? Demke, Torsten
2004-07-20 22:00 ` David Woodhouse [this message]
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