Re: [PATCH 0/4] arch: Introduce smp_load_acquire() and smp_store_release()

Paul E. McKenney
2013-12-18T20:56:04Z

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@infradead.org
>
> - fixed linux-kernel email address
> - updated the Documentation patch
>