linux-kernel - Re: [PATCH powerpc/next v6 0/4] atomics: powerpc: Implement relaxed/acquire/release variants

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Message-ID: <20151223033334.GA28539@fixme-laptop.cn.ibm.com>
Date:	Wed, 23 Dec 2015 11:33:34 +0800
From:	Boqun Feng <boqun.feng@...il.com>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Will Deacon <will.deacon@....com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Waiman Long <waiman.long@...com>,
	Davidlohr Bueso <dave@...olabs.net>
Subject: Re: [PATCH powerpc/next v6 0/4] atomics: powerpc: Implement
 relaxed/acquire/release variants

On Wed, Dec 23, 2015 at 01:40:05PM +1100, Michael Ellerman wrote:
> On Tue, 2015-12-15 at 22:24 +0800, Boqun Feng wrote:
> 
> > Hi all,
> > 
> > This is v6 of the series.
> > 
> > Link for v1: https://lkml.org/lkml/2015/8/27/798
> > Link for v2: https://lkml.org/lkml/2015/9/16/527
> > Link for v3: https://lkml.org/lkml/2015/10/12/368
> > Link for v4: https://lkml.org/lkml/2015/10/14/670
> > Link for v5: https://lkml.org/lkml/2015/10/26/141
> > 
> > 
> > Changes since v5:
> > 
> > *	rebase on the next branch of powerpc.
> > 
> > *	pull two fix and one testcase patches out, which are already
> > 	sent separately
> > 
> > *	some clean up or code format fixing.
> > 
> > 
> > Paul, Peter and Will, thank you for your comments and suggestions in the review
> > of previous versions. From this version on, This series is against the next
> > branch of powerpc tree, because most of the code touch arch/powerpc/*.
> 
> 
> Sorry if we already discussed this, but did we decide how we were going to
> merge this? There's the one patch to generic code and then three powerpc
> patches.
> 

We might have "discussed" this ;-) As I proposed this would go to the
powerpc next in this mail:

http://marc.info/?l=linux-kernel&m=144660021417639&w=2

Regards,
Boqun

> It'd make most sense for it to go via powerpc I think. Given that the change to
> generic code is relatively trivial I'll plan to merge this unless someone
> objects.
> 
> Also it is pretty late in the -next cycle for something like this. But AFAICS
> there are no users of these "atomic*relaxed" variants yet other than arm64 code
> and qspinlocks, neither of which are used on powerpc. So adding them should be
> pretty harmless.
> 
> cheers
> 

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