On Thu, 2016-04-21 at 14:12 +1000, Balbir Singh wrote:
> > + } while (cpu_to_be64(old_pte) != __cmpxchg_u64((unsigned long *)ptep,
> > + cpu_to_be64(old_pte),
> > + cpu_to_be64(new_pte)));
> > + /* We already do a sync in cmpxchg, is ptesync needed ?*/
> > + asm volatile("ptesync" : : : "memory");
>
> Yes, I think ptesync is required after PTE changes
Is it really on radix ? I'm not 100% sure... it's usually needed to
synchronize the writebacks of R and C...
Cheers,
Ben.
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