linux-kernel - Re: [patch 0/8] genirq: Support for irq domains in generic irq chip

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Date:	Tue, 01 Oct 2013 17:27:31 +0200
From:	Gerlando Falauto <gerlando.falauto@...mile.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>, Arnd Bergmann <arnd@...db.de>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Jean-Francois Moine <moinejf@...e.fr>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [patch 0/8] genirq: Support for irq domains in generic irq chip
 - V2

Hi Thomas, Sebastian,

I see these changes made it to 3.11.
AFAICT though, 3.10.9 still has the original bug (the one that got me to 
write the patch for handling separate mask registers) and I am bit 
confused as to how to integrate that back into 3.10 (or any previous 
affected kernels, as they deserve a fix as well!).

The way I understand it, any mainstream patch would be based on this 
work, which is not available on previous kernels. And I guess 
backporting the whole thing would be overkill.
So I believe the only way to fix it on older kernels would be to write 
one (or more) minimal version-specific patch series.
But then I wonder: would that be acceptable material for linux-stable?

Please correct me if I'm totally wrong here. I'm willing to help & test 
but I need directions.

Thanks,
Gerlando

On 05/06/2013 04:30 PM, Thomas Gleixner wrote:
> Changes vs. V1:
>
> 	- Fixed the generic chip pointer thinko (Sebastian Hesselbarth)
>
> 	- Proper support for mask cache
>
> 	- Read mask hardware only for the first map of an generic chip
>            instance
>
> 	- sun4i prefix irq functions proper
>
> Thanks,
>
> 	tglx
>
>

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