On Thu, 4 Jul 2013, Benjamin Herrenschmidt wrote:
> On Thu, 2013-07-04 at 09:31 +0100, David Laight wrote:
> > Do you need to execute 'sync' here?
> > It is worth checking whether the trap entry/exit doesn't
> > do an implicit one for you.
>
> Not really. It does an implicit isync (more than one
On Thu, 2013-07-04 at 09:31 +0100, David Laight wrote:
> Do you need to execute 'sync' here?
> It is worth checking whether the trap entry/exit doesn't
> do an implicit one for you.
Not really. It does an implicit isync (more than one even) but
not a sync.
Cheers,
Ben.
_
> Reserved fields of the sync instruction have been used for other
> instructions (e.g. lwsync). On processors that do not support variants
> of the sync instruction, emulate it by executing a sync to subsume the
> effect of the intended instruction.
...
> + /* Emulate sync instruction variant
