linux-kernel - Re: How to merge? (was Re: [PATCH][v4] livepatch/ppc: Enable livepatching on powerpc)

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Date:	Mon, 7 Mar 2016 23:52:31 +0100 (CET)
From:	Jiri Kosina <jikos@...nel.org>
To:	Michael Ellerman <mpe@...erman.id.au>
cc:	Petr Mladek <pmladek@...e.com>, linuxppc-dev@...abs.org,
	jeyu@...hat.com, linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	kamalesh@...ux.vnet.ibm.com, duwe@....de,
	live-patching@...r.kernel.org, mbenes@...e.cz,
	Torsten Duwe <duwe@...e.de>, vojtech@...e.com,
	jpoimboe@...hat.com, sjenning@...hat.com
Subject: Re: How to merge? (was Re: [PATCH][v4] livepatch/ppc: Enable
 livepatching on powerpc)

On Mon, 7 Mar 2016, Michael Ellerman wrote:

> > This aligns with my usual workflow, so that'd be my preferred way of doing
> > things; i.e. you put all the ftrace changes into a separate topic branch,
> > and then
> >
> > - you pull that branch into powerpc#next
> > - I pull that branch into livepatching tree
> > - I apply the ppc livepatching support on top of that
> > - I send a pull request to Linus only after powerpc#next gets merged to
> >   Linus' tree
> >
> > Sounds good?
> 
> Yep, here it is:
> 
>   https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/log/?h=topic/mprofile-kernel
> 
> aka:
> 
>   git fetch git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git topic/mprofile-kernel

Excellent, thanks.

> I haven't merged it into my next yet, but I will tomorrow unless you tell me
> there's something wrong with it.

There is one remaining issue which I think would be really nice to 
have(TM), and that's Steven's Ack for the whole thing :)

For the livepatching part, I don't think we are quite there yet (so maybe 
it'll miss the upcoming merge window anyway).

My primary worry there is what Torsten pointed out, i.e. functions with 
either varargs or more than 8 args needing special care.

Also, I'd like to have this positively reviewed by at least one more 
livepatching maintainer (I am currently looking into it myself, but my 
understanding of powerpc arch is rather low, so the more eyes, the 
better).

Thanks!

-- 
Jiri Kosina
SUSE Labs