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Message-ID: <53D7A6A2.9020005@arm.com>
Date: Tue, 29 Jul 2014 14:50:26 +0100
From: Sudeep Holla <sudeep.holla@arm.com>
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To: Hanjun Guo <hanjun.guo@linaro.org>,
        Catalin Marinas <Catalin.Marinas@arm.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Mark Rutland <Mark.Rutland@arm.com>
CC: Sudeep Holla <sudeep.holla@arm.com>,
        "graeme.gregory@linaro.org" <graeme.gregory@linaro.org>,
        Arnd Bergmann <arnd@arndb.de>,
        "grant.likely@linaro.org" <grant.likely@linaro.org>,
        Will Deacon <Will.Deacon@arm.com>, Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <Marc.Zyngier@arm.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Mark Brown <broonie@linaro.org>, Robert Richter <rric@kernel.org>,
        Lv Zheng <lv.zheng@intel.com>, Robert Moore <robert.moore@intel.com>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
        Liviu Dudau <Liviu.Dudau@arm.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Charles Garcia-Tobin <Charles.Garcia-Tobin@arm.com>,
        "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Al Stone <al.stone@linaro.org>,
        Tomasz Nowicki <tomasz.nowicki@linaro.org>
Subject: Re: [PATCH 01/19] ARM64 / ACPI: Get RSDP and ACPI boot-time tables
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>
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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

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