linux-kernel - Re: [PATCH v2 RESEND 07/18] x86, ACPI: Also initialize signature and length when parsing root table.

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Message-ID: <5315714.F7fnXQVuXS@vostro.rjw.lan>
Date:	Mon, 05 Aug 2013 15:28:40 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	robert.moore@...el.com, lv.zheng@...el.com, lenb@...nel.org,
	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	izumi.taku@...fujitsu.com, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	zhangyanfei@...fujitsu.com, yanghy@...fujitsu.com, x86@...nel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2 RESEND 07/18] x86, ACPI: Also initialize signature and length when parsing root table.

On Monday, August 05, 2013 09:33:32 AM Tang Chen wrote:
> Hi Rafael,
> 
> On 08/02/2013 09:03 PM, Rafael J. Wysocki wrote:
> > On Friday, August 02, 2013 05:14:26 PM Tang Chen wrote:
> >> Besides the phys addr of the acpi tables, it will be very convenient if
> >> we also have the signature of each table in acpi_gbl_root_table_list at
> >> early time. We can find SRAT easily by comparing the signature.
> >>
> >> This patch alse record signature and some other info in
> >> acpi_gbl_root_table_list at early time.
> >>
> >> Signed-off-by: Tang Chen<tangchen@...fujitsu.com>
> >> Reviewed-by: Zhang Yanfei<zhangyanfei@...fujitsu.com>
> >
> > The subject is misleading, as the change is in ACPICA and therefore affects not
> > only x86.
> 
> OK, will change it.
> 
> >
> > Also I think the same comments as for the other ACPICA patch is this series
> > applies: You shouldn't modify acpi_tbl_parse_root_table() in ways that would
> > require the other OSes using ACPICA to be modified.
> >
> 
> Thank you for the reminding. Please refer to the attachment.
> How do you think of the idea from Zheng ?

It's doable and, quite frankly, if the ACPICA maintainers are happy, I'm fine
with that too.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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