linux-kernel - Re: [PATCH 0/4] arch: Introduce smp_load_acquire() and smp_store

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Message-ID: <20131218205556.GT19211@linux.vnet.ibm.com>
Date:	Wed, 18 Dec 2013 12:55:56 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	geert@...ux-m68k.org, torvalds@...ux-foundation.org,
	VICTORK@...ibm.com, oleg@...hat.com, anton@...ba.org,
	benh@...nel.crashing.org, fweisbec@...il.com,
	mathieu.desnoyers@...ymtl.ca, michael@...erman.id.au,
	mikey@...ling.org, linux@....linux.org.uk, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, tony.luck@...el.com
Subject: Re: [PATCH 0/4] arch: Introduce smp_load_acquire() and
 smp_store_release()

On Wed, Dec 18, 2013 at 08:08:06PM +0100, Peter Zijlstra wrote:
> 
> This should hopefully be the last posting of this series -- people felt it
> needed one more mostly because last time I typoed the linux-kernel email
> address.
> 
> If there are no further comments, Ingo will merge these patches in the next few
> days.

They still look good to me!

							Thanx, Paul

> ---
> 
> These patches introduce 2 new barrier primitives:
> 
>   smp_load_acquire(p)
>   smp_store_release(p, v)
> 
> See the first patch, which changes Documentation/memory-barriers.txt, to find
> the exact definitions of what an ACQUIRE/RELEASE barrier is -- previously known
> as LOCK/UNLOCK barriers.
> 
> The second patch moves the smp_mb__{before,after}_atomic_{dec,inc}() barriers
> to asm/atomic.h for arc and hexagon -- they were already there for all other archs.
> 
> This cleans up asm/barrier.h, and the third patch makes more agressive use of
> asm-generic/barrier.h to implement the simple cases.
> 
> Then the fourth patch adds the new primitives.
> 
> Previous versions were widely build tested -- this version is not, but it also
> not significantly different.
> 
> These patches apply to:
> 
>   tip/master
> 
> 
> ---
> Changes since the last version -- lkml.kernel.org/r/20131213145657.265414969@...radead.org
> 
>  - fixed linux-kernel email address
>  - updated the Documentation patch
> 

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