linux-kernel - Re: [PATCH] ACPI: remove unused ACPI

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Date:	Tue, 29 Oct 2013 13:51:35 +0800
From:	Lan Tianyu <lantianyu1986@...il.com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Michael Opdenacker <michael.opdenacker@...e-electrons.com>,
	Len Brown <lenb@...nel.org>, rjw@...ysocki.net,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r kernel org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI: remove unused ACPI_PROCFS Kconfig param

2013/10/28 Paul Bolle <pebolle@...cali.nl>:
> On Mon, 2013-10-28 at 07:22 +0100, Michael Opdenacker wrote:
>> [...] CONFIG_ACPI_PROCFS is no longer used anywhere, neither in
>> Makefiles nor in the source code. ACPI_PROCFS isn't event used in
>> Kconfig files as an intermediate dependency.
>>
>> What I deduce from that is that even if you set CONFIG_ACPI_PROCFS=y in
>> the kernel configuration, this will have no impact at all.
>
> About half a year ago I noticed that this Kconfig symbol is unused since
> v2.6.38 [0]. As, apparently, nothing has changed it is currently unused
> for over two and a half years.
>
> I still don't really understand the purpose of this symbol. But whatever
> it is, it might as well be dropped. If it's ever needed again it could
> be re-added. Or, perhaps, an entirely different approach could be used
> to accomplish what that symbol is supposed to do.

I prefer the later. I will add new sysfs interface for LID status and make
all proc related code in the /driver/acpi/button.c under CONFIG_ACPI_PROCFS.

>
>
> Paul Bolle
>
> [0] http://marc.info/?l=linux-acpi&m=136398635322975
>



-- 
Best regards
Tianyu Lan
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