On 09/11/2015 06:27 PM, Davidlohr Bueso wrote:
On Fri, 11 Sep 2015, Waiman Long wrote:
@@ -46,7 +46,7 @@ static inline bool virt_queued_spin_lock(struct
qspinlock *lock)
if (!static_cpu_has(X86_FEATURE_HYPERVISOR))
return false;
- while (atomic_cmpxchg(&lock->val, 0, _Q_LOCKED_VAL) != 0)
+ while (atomic_cmpxchg_acquire(&lock->val, 0, _Q_LOCKED_VAL) != 0)
cpu_relax();
This code has changed with Peter's recent ccas fix. And the whole
virt_queued_spin_lock()
thing will now be under pv configs. So this doesn't apply to native
code anymore, so it
looks like it should be dropped altogether.
Thanks,
Davidlohr
You are right. Patch 1 needs to be updated on top of PeterZ latest patch.
Cheers,
Longman
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