linux-kernel - Re: [GIT PATCH] ACPI patches for 2.6.21

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Date:	Fri, 9 Feb 2007 23:27:03 -0500
From:	Len Brown <lenb@...nel.org>
To:	Pavel Machek <pavel@....cz>
Cc:	Linus Torvalds <torvalds@...l.org>, Andrew Morton <akpm@...l.org>,
	tony.luck@...el.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org,
	"Accardi, Kristen" <kristen.c.accardi@...el.com>
Subject: Re: [GIT PATCH] ACPI patches for 2.6.21

On Friday 09 February 2007 18:09, Pavel Machek wrote:
> Hi!
> 
> > Per your request, and the request of the distros, we've changed
> > how ACPICA Core releases are integrated into Linux so that each
> > upstream (CVS) check-in appears as a single git commit.
> > While this process is not yet perfect, it should be vastly better
> > than previous "code drops" in allowing git bisect to work,
> > and allowing distros to cherry-pick individual fixes.
> > 
> > The "bay" driver is new (and marked EXPERIMENTAL) -- adding initial
> > hot-plug support for ACPI controlled drive bays such as the
> > IBM ultrabay or the Dell Module Bay.
> 
> Could you describe userland interface it uses? /proc? Will it be
> usable for bays on notebooks not using acpi?

No, Not until somebody finds one and writes code to support it.

> > The "asus-laptop" driver is also new.  Consistent with msi-laptop,
> > it uses ACPI in platform-specific ways, but strives to avoid
> > exposing ACPI-specific implementation details to the user.
> > asus-laptop is mutually exclusive with asus_acpi, which it will
> > replace over time.
> 
> Not including another /proc/acpi/ibm -like nightmare, is it?

No. See discussion on linux-acpi.
I've prohibited new files under /proc/acpi/ for quite some time now.

> > the old /proc/acpi/ interfaces with cleaner interfaces in sysfs --
> > non-ACPI-specific generic ones whenever possible.  This effort
> > is not complete, but it has been in -mm for a long time and
> > I believe that it is time to push it upstream to benefit
> > from broader exposure and testing.
> 
> Does it still include completely broken alarm interface? Can't find it
> in changelogs, so hopefully not.

No. See discussion on linux-acpi.
David Brownell's RTC driver will provide the new RTC interface in sysfs.
/proc/acpi/alarm will go away when the rest of /proc/acpi goes away.

thanks,
-Len
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