linux-kernel - Re: [PATCH 1/5] ARM: defconfigs: add MTD_SPI

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Message-ID: <CAOesGMi0zK8H=Ok81ZLhssvG5gsbvanY4dct_PF95Exq6p3tfg@mail.gmail.com>
Date:	Sat, 3 May 2014 15:51:11 -0700
From:	Olof Johansson <olof@...om.net>
To:	Jason Cooper <jason@...edaemon.net>
Cc:	Brian Norris <computersforpeace@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Marek Vasut <marex@...x.de>,
	Russell King <linux@....linux.org.uk>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Shawn Guo <shawn.guo@...escale.com>
Subject: Re: [PATCH 1/5] ARM: defconfigs: add MTD_SPI_NOR (new dependency for M25P80)

On Wed, Apr 30, 2014 at 4:45 AM, Jason Cooper <jason@...edaemon.net> wrote:
> On Tue, Apr 29, 2014 at 12:06:03PM -0700, Brian Norris wrote:
>> Hi Stephen,
>>
>> On Fri, Apr 25, 2014 at 10:39:37AM -0600, Stephen Warren wrote:
>> > On 04/17/2014 01:21 AM, Brian Norris wrote:
>> > > These defconfigs contain the CONFIG_M25P80 symbol, which is now
>> > > dependent on the MTD_SPI_NOR symbol. Add CONFIG_MTD_SPI_NOR to the
>> > > relevant defconfigs.
>> > >
>> > > At the same time, drop the now-nonexistent CONFIG_MTD_CHAR symbol.
>> >
>> > I hadn't realized that the problem this patch solves was already present
>> > in the code, so this patch is simply catching up the defconfigs rather
>> > than part of a series which changed the code to cause the problem.
>>
>> Yes, this is "catching up the defconfigs." The SPI_NOR framework is new,
>> and I didn't want to generate defconfig noise until a few things
>> stabilized (particularly, its Kconfig symbol name).
>>
>> > So, this needs to be applied ASAP.
>> >
>> > I think this should be split it up so that each defconfig can go through
>> > the tree that owns it to avoid conflicts. If you repost split up, I can
>> > apply the tegra_defconfig change to the Tegra tree.
>>
>> OK, I'll try to split it up. Is ARM unique in tracking defconfigs in
>> separate trees? I assume MIPS, PowerPC, and Blackfin won't require the
>> same splitting? I'd like to avoid 31 patches when <20 could suffice.
>
> wrt arm-soc, typically they take all changes to multi_v7_defconfig
> directly since it is prone to conflicts.  All the other ones are managed
> by the individual sub-arch maintainers.
>
>> I'll also rebase on linux-next. I think there may be a few conflicts.
>
> I can't speak for the other sub-archs, but I typically prefer that
> patches be based on an -rc tag, -rc1 if possible.

This is making a trivial patch a pain to get merged.

Cases like these are easiest that we just take the patch directly in
an early-merge branch (i.e. cleanup or fixes-non-critical, or a
generic depends branch), and if there's conflicts as topics are merged
in from subplatforms we can deal with it then.


-Olof
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