On Fri, Apr 10, 2015 at 04:30:51PM +1000, Alexey Kardashevskiy wrote: > Normally a bitmap from the iommu_table is used to track what TCE entry > is in use. Since we are going to use iommu_table without its locks and > do xchg() instead, it becomes essential not to put bits which are not > implied in the direction flag.
It's not clear to me from this why lack of locking implies the need to
not put extra bits in.
> This adds iommu_direction_to_tce_perm() (its counterpart is there already)
> and uses it for powernv's pnv_tce_build().
>
> Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
I have no objection to the patch though, so
Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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