| Date | Thu, 13 Apr 2017 11:18:32 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH tip/core/rcu 07/13] rcu: Add smp_mb__after_atomic() to sync_exp_work_done() |
| |
On Wed, Apr 12, 2017 at 09:55:43AM -0700, Paul E. McKenney wrote: > However, a little future-proofing is a good thing, > especially given that smp_mb__before_atomic() is only required to > provide acquire semantics rather than full ordering. This commit > therefore adds smp_mb__after_atomic() after the atomic_long_inc() > in sync_exp_work_done().
Oh!? As far as I'm away the smp_mb__{before,after}_atomic() really must provide full MB, no confusion about that.
We have other primitives for acquire/release.
|