On Tue, Aug 05, 2014 at 09:57:51AM +0200, Christian Borntraeger wrote:
> commit 4badad352a6bb202ec68afa7a574c0bb961e5ebc (locking/mutex: Disable
> optimistic spinning on some architectures) fenced spinning for
> architectures without proper cmpxchg.
> There is no need to disable mutex spinning on s
commit 4badad352a6bb202ec68afa7a574c0bb961e5ebc (locking/mutex: Disable
optimistic spinning on some architectures) fenced spinning for
architectures without proper cmpxchg.
There is no need to disable mutex spinning on s390, though:
The instructions CS,CSG and friends provide the proper guarantees.
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