From: Len Brown <lenb@kernel.org>
To: akpm@linux-foundation.org
Cc: linux-acpi@vger.kernel.org, jpk@sgi.com
Subject: Re: [patch 5/6] Altix: reinitialize acpi tables
Date: Wed, 7 Mar 2007 02:34:25 -0500 [thread overview]
Message-ID: <200703070234.25710.lenb@kernel.org> (raw)
In-Reply-To: <200703061029.l26AThio019132@shell0.pdx.osdl.net>
Andrew,
This patch is munged -- please remove it from mm.
The correct patch is already present in git-acpi.patch,
which perhaps is why patch munged it on entry into mm.
thanks,
-Len
On Tuesday 06 March 2007 05:29, akpm@linux-foundation.org wrote:
> From: John Keller <jpk@sgi.com>
>
> To provide compatibilty with SN kernels that do and do not have ACPI IO
> support, the SN PROM must build different versions of some ACPI tables
> based on which kernel is booting. As such, the tables may have to change
> at kernel boot time. By default, prior to kernel boot, the PROM builds an
> empty DSDT (header only) and no SSDTs. If an ACPI capable kernel boots,
> the kernel will notify the PROM, at platform setup time, and the PROM will
> build full DSDT and SSDT tables.
>
> With the latest changes to acpi_table_init(), the table lengths are saved,
> and when our PROM changes them, the changes are not seen, and the kernel
> will crash on boot. Because of issues with kexec support, we are not able
> to create the tables prior to acpi_table_init(). As a result, we are
> making a second call to acpi_table_init() to process the rebuilt DSDT and
> SSDTs.
>
> Signed-off-by: John Keller <jpk@sgi.com>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
>
> arch/ia64/sn/kernel/setup.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff -puN arch/ia64/sn/kernel/setup.c~altix-reinitialize-acpi-tables arch/ia64/sn/kernel/setup.c
> --- a/arch/ia64/sn/kernel/setup.c~altix-reinitialize-acpi-tables
> +++ a/arch/ia64/sn/kernel/setup.c
> @@ -54,6 +54,8 @@
> #include "xtalk/hubdev.h"
> #include <asm/sn/klconfig.h>
>
> + /* Load the new DSDT and SSDT tables into the global table list. */
> + acpi_table_init();
>
> DEFINE_PER_CPU(struct pda_s, pda_percpu);
>
> _
> -
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>
prev parent reply other threads:[~2007-03-07 7:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-06 10:29 [patch 5/6] Altix: reinitialize acpi tables akpm
2007-03-07 7:34 ` Len Brown [this message]
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