linux-kernel - Re: [PATCH v6 00/17] memory: omap-gpmc: mtd: nand: Support GPMC NAND on non-OMAP platforms

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Date:	Fri, 15 Apr 2016 13:51:08 +0200
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Roger Quadros <rogerq@...com>
Cc:	<javier@...hile0.org>, <fcooper@...com>, <nsekhar@...com>,
	<linux-mtd@...ts.infradead.org>, <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	<computersforpeace@...il.com>, <dwmw2@...radead.org>,
	<ezequiel@...guardiasur.com.ar>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 00/17] memory: omap-gpmc: mtd: nand: Support GPMC
 NAND on non-OMAP platforms

Roger, Tony,

On Fri, 15 Apr 2016 13:54:34 +0300
Roger Quadros <rogerq@...com> wrote:

> On 15/04/16 13:09, Boris Brezillon wrote:
> > Hi Roger,
> > 
> > On Fri, 15 Apr 2016 12:34:04 +0300
> > Roger Quadros <rogerq@...com> wrote:
> > 
> >> Tony & Boris,
> >>
> >> On 14/04/16 00:25, Tony Lindgren wrote:
> >>> * Roger Quadros <rogerq@...com> [160407 03:10]:
> >>>> Hi,
> >>>>
> >>>> As this series has cross dependency between omap and mtd subsystems,
> >>>> I'll set up a immutable branch which omap-soc and l2-mtd must
> >>>> merge in together to avoid any conflicts/breakage during integration.
> >>>>
> >>>> Brian has acked all mtd patches. Tony needs to give his Ack for the
> >>>> gpmc driver part and then I can provide the immutable branch.
> >>>
> >>> Looks good to me, please feel free to add:
> >>>
> >>> Acked-by: Tony Lindgren <tony@...mide.com>
> >>>
> >>
> >> I've added Tony and Rob's Acked-by tags and pushed the patches at the
> >> below PULL request.
> >>
> >> Please take this into omap-soc and l2-mtd trees. Thanks.
> > 
> > I Pulled this branch into nand/next and had to resolve a few conflicts
> > (as you may have noticed, a few other reworks in the NAND and MTD layer
> > have been merged in the meantime).
> 
> OK. I'm not sure how well this will play when this merges into liunx-next
> via the omap-soc tree.
> 
> Instead, can you please create a non-mutable nand/base for me (which could be
> today's nand/next) and I can base my branch on that and Tony can use my
> branch without causing any merge-conflict in linux-next?

I just created a branch called nand/for-gpmc-rework based on today's
nand/next, but I'm still unsure how to proceed once you've rebased your
work on this branch?

Tony will first have to pull my immutable branch, then pull yours, and
then I'll have to pull an immutable branch from the the omap-soc tree
to get your changes into my nand/next branch (in case other patches
modify the same files before I send my PR). Am I missing something?
If I'm not, then this option looks over-complicated to me.

ITOH, if we decide to let your patches go through the nand or omap-soc
tree, only one immutable branch will be created, and either the nand or
omap-soc maintainer (depending on who takes the patches) will have to
pull it into its -next branch.

I'm quite new to all this merging process, so don't hesitate to correct
me if I'm wrong.

Thanks,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com