Messages in this thread | | | Date | Thu, 1 Oct 2015 14:28:02 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC v2 6/7] powerpc: atomic: Make atomic{,64}_xchg and xchg a full barrier |
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On Wed, Sep 16, 2015 at 11:49:34PM +0800, Boqun Feng wrote: > According to memory-barriers.txt, xchg and its atomic{,64}_ versions > need to imply a full barrier, however they are now just RELEASE+ACQUIRE, > which is not a full barrier. > > So remove the definition of xchg(), and let __atomic_op_fence() build > the full-barrier versions of these operations.
Do you want to do a patch for -stable fixing the current implementation?
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