From mboxrd@z Thu Jan  1 00:00:00 1970
From: sudeep.holla@arm.com (Sudeep Holla)
Date: Tue, 29 Jul 2014 14:50:26 +0100
Subject: [PATCH 01/19] ARM64 / ACPI: Get RSDP and ACPI boot-time tables
In-Reply-To: <53D79CD8.9050709@linaro.org>
References: <1406206825-15590-1-git-send-email-hanjun.guo@linaro.org>
 <1406206825-15590-2-git-send-email-hanjun.guo@linaro.org>
 <53D69678.20002@arm.com> <53D79CD8.9050709@linaro.org>
Message-ID: <53D7A6A2.9020005@arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org



On 29/07/14 14:08, Hanjun Guo wrote:
> On 2014-7-29 2:29, Sudeep Holla wrote:
> [...]
>>> +
>>> +/*
>>> + * We never plan to use RSDT on arm/arm64 as its deprecated in spec but this
>>> + * variable is still required by the ACPI core
>>> + */
>>> +u32 acpi_rsdt_forced;
>>
>> This looks like yet another stray variable not used anywhere including
>> core ACPI
>
> It will be used by ACPICA to get the RSDP in acpi_tb_parse_root_table()
> in tbutils.c.
>

No I couldn't find it in mainline/acpica/linux-next(pm tree).

On further digging found that commit fab461058385("ACPICA: Cleanup the
option of forcing the use of the RSDT") has renamed it to
acpi_gbl_do_not_use_xsdt and moved it into acpica with default false.
So you can remove this.

Regards,
Sudeep