linux-kernel - Re: [PATCH] apm: orphan the driver

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Message-ID: <AANLkTimqE2YZCH5GonnqeHGGBwzggTymauS1KYuTsqOX@mail.gmail.com>
Date:	Mon, 28 Mar 2011 11:46:18 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Jiri Kosina <jkosina@...e.cz>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	Len Brown <lenb@...nel.org>,
	linux-pm@...ts.linux-foundation.org,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ondrej Zary <linux@...nbow-software.org>
Subject: Re: [PATCH] apm: orphan the driver

On Mon, Mar 28, 2011 at 11:21 AM, Andi Kleen <andi@...stfloor.org> wrote:
>
> Phasing out APM idle at least would be reasonable.  resumably even if the old
> laptops still work they are likely on AC because their batteries have
> long died. So using a bit more power in idle shouldn't be a big
> issue.

Agreed. Especially since I'm not at all convinced that APM CPU idling
ever really worked in the first place.

And as you say, it's not a catastrophic failure even if we were to
remove it, and even if it were to have mattered on those old laptops
years ago. I think we can happily say "not worth worrying about" when
it comes to APM_CPU_IDLE.

And shutdown, suspend and screensaver should all be much easier to
continue to support - they shouldn't have any serious infrastructure
issues.

                       Linus
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