From: Wolfgang Grandegger <wolfgang.grandegger@bluewin.ch>
To: David Ashley <dash@xdr.com>
Cc: dan@embeddededge.com, linuxppc-embedded@lists.linuxppc.org
Subject: Re: Linux 2.4.17 bug, mmap of /dev/mem
Date: Wed, 27 Feb 2002 23:05:49 +0100 [thread overview]
Message-ID: <3C7D583D.80104@bluewin.ch> (raw)
In-Reply-To: 200202272148.g1RLmOr06455@xdr.com
David Ashley wrote:
>I can see the problem right in arch/ppc/mm/ppc_mmu.c, in the MMU_init_hw
>function. The code goes:
> if ((cur_cpu_spec[0]->cpu_features & CPU_FTR_HPTE_TABLE) == 0)
> return;
>
>But later on there is code to set hash_page[0] = 0x4e800020. Instead
>of returning it should execute that else clause, and make hash_page return.
>
>After making that change the problem appears fixed, at long last. It wasn't
>buggy hardware at all, it *was* a bug in the linux kernel.
>
Hmm, it seems to be ok in the linux_2_4_devel tree:
http://ppc.bkbits.net:8080/linuxppc_2_4_devel/anno/arch/ppc/mm/ppc_mmu.c@1.4?nav=index.html|src/.|src/arch|src/arch/ppc|src/arch/ppc/mm
Does this mean that the linux_2_4 tree is less up-to-date?
Wolfgang.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2002-02-27 22:05 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-27 21:48 Linux 2.4.17 bug, mmap of /dev/mem David Ashley
2002-02-27 22:05 ` Wolfgang Grandegger [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-02-27 21:36 David Ashley
2002-02-27 21:04 David Ashley
2002-02-27 21:06 ` Dan Malek
2002-02-26 20:17 David Ashley
2002-02-26 16:00 David Ashley
2002-02-26 3:15 David Ashley
2002-02-26 3:50 ` Dan Malek
2002-02-26 14:43 ` John W. Linville
2002-02-26 15:18 ` Wolfgang Denk
2002-02-26 17:06 ` Dan Malek
2002-02-26 0:36 David Ashley
2002-02-26 0:18 David Ashley
2002-02-26 0:06 David Ashley
2002-02-25 23:43 David Ashley
[not found] <3C7AC345.301@embeddededge.com>
2002-02-25 23:26 ` Wolfgang Denk
2002-02-25 22:29 David Ashley
2002-02-25 22:41 ` Wolfgang Denk
2002-02-26 0:57 ` Greg Griffes
2002-02-26 1:34 ` Dan Malek
2002-02-25 20:27 David Ashley
2002-02-25 20:54 ` Dan Malek
2002-02-25 21:06 ` Dan Malek
2002-02-25 22:36 ` Wolfgang Denk
2002-02-25 18:16 David Ashley
2002-02-25 18:51 ` Dan Malek
2002-02-20 15:54 David Ashley
2002-02-15 7:17 Goddeeris Frederic
2002-02-14 17:06 David Ashley
2002-02-14 9:22 Goddeeris Frederic
2002-02-12 0:36 David Ashley
2002-02-08 16:07 David Ashley
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