linux-kernel - Re: [origin tree build failure] [PATCH] thinkpad-acpi: Fix build on !CONFIG_THINKPAD_ACPI_HOTKEY

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Date:	Thu, 1 Oct 2009 11:57:43 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	Len Brown <lenb@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-acpi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [origin tree build failure] [PATCH] thinkpad-acpi: Fix build
	on !CONFIG_THINKPAD_ACPI_HOTKEY_POLL


* Henrique de Moraes Holschuh <hmh@....eng.br> wrote:

> On Mon, 28 Sep 2009, Ingo Molnar wrote:
> > * Len Brown <lenb@...nel.org> wrote:
> > > > > >  drivers/platform/x86/thinkpad_acpi.c    |  632 +++++++++++++++++++---------
> > > > > 
> > > > > -tip testing found that these changes caused a build failure 
> > > > > in drivers/platform/x86/thinkpad_acpi.c when 
> > > > > !CONFIG_THINKPAD_ACPI_HOTKEY_POLL - the fix is attached  below.
> > > > 
> > > > Fixed by a different patch, which will hit mainline soon....
> > > 
> > > Ingo,
> > > 2.6.32-rc1 should build fine* -- let me know if it doesn't.
> > > 
> > > thanks,
> > > Len Brown, Intel Open Source Technology Center
> > > 
> > > * module this message, which Henruque assures me will go away soon
> > > drivers/platform/x86/thinkpad_acpi.c:2225: warning: 
> > > ???tpacpi_hotkey_driver_mask_set??? defined but not used
> > 
> > well, the warning is fixed properly in my patch, as pointed out in the 
> > changelog. Have you read that?
> 
> Your patch will break the driver when the functionality that uses 
> tpacpi_hotkey_driver_mask_set() lands in mainline.  That functionality 
> is already in a subsystem tree waiting a push to Linus.
> 
> Of course, you had no way to know that, and I failed to convey that 
> detail (mostly because _I_ screwed up and forgot I had that patch 
> already applied) when I replied to you.  Sorry about that.
> 
> The patch adding that functionality had already been submitted at the 
> time you sent in your patch, and it will be merged through the 
> backlight tree very soon.  That patch couldn't arrive earlier because 
> it needed changes both in the backlight tree AND in the ACPI tree, and 
> nobody knew which tree would merge first.
> 
> Now that all dependencies (both from backlight and ACPI) are already 
> in mainline, I asked Richard Purdie to send it to Linus together with 
> his next batch of backlight updates.  That will silence the warning 
> about tpacpi_hotkey_driver_mask_set().

Ok, thanks for the update!

	Ingo
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