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SubjectRe: [PATCH] ACPI: remove unused ACPI_PROCFS Kconfig param
2013/10/28 Paul Bolle <>:
> 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]

Best regards
Tianyu Lan

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