linux-kernel - Re: [RESEND, tip/locking/core, v5, 1/6] powerpc: atomic: Make _return atomics and *{cmp}xchg fully ordered

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Message-ID: <20151104012213.GA11056@fixme-laptop.cn.ibm.com>
Date:	Wed, 4 Nov 2015 09:22:13 +0800
From:	Boqun Feng <boqun.feng@...il.com>
To:	Michael Ellerman <mpe@...erman.id.au>,
	Peter Zijlstra <peterz@...radead.org>,
	Will Deacon <will.deacon@....com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Waiman Long <waiman.long@...com>,
	Davidlohr Bueso <dave@...olabs.net>, stable@...r.kernel.org,
	Paul Mackerras <paulus@...ba.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [RESEND, tip/locking/core, v5, 1/6] powerpc: atomic: Make
 _return atomics and *{cmp}xchg fully ordered

On Mon, Nov 02, 2015 at 09:22:40AM +0800, Boqun Feng wrote:
> > On Tue, Oct 27, 2015 at 11:06:52AM +0800, Boqun Feng wrote:
> > > To summerize:
> > > 
> > > patch 1(split to two), 3, 4(remove inc/dec implementation), 5, 6 sent as
> > > powerpc patches for powerpc next, patch 2(unmodified) sent as tip patch
> > > for locking/core.
> > > 
> > > Peter and Michael, this works for you both?
> > > 
> > 
> > Thoughts? ;-)
> > 
> 
> Peter and Michael, I will split patch 1 to two and send them as patches
> for powerpc next first. The rest of this can wait util we are on the
> same page of where they'd better go.
> 

I'm about to send patch 2(adding trivial tests) as a patch for the tip
tree, and rest of this series will be patches for powerpc next.

Will, AFAIK, you are currently working on variants on arm64, right? I
wonder whether you depend on patch 3 (allow archictures to provide
self-defined __atomic_op_*), if so I can also send patch 3 as a patch
for tip tree and wait until it merged into powerpc next to send the
rest. 

Thanks and Best Regards,
Boqun

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