[kernel, v11, 04/10] powerpc/vfio_spapr_tce: Add reference counting to iommu_table

[Michael Ellerman]

On Wed, 2017-03-22 at 04:21:50 UTC, Alexey Kardashevskiy wrote:
> So far iommu_table obejcts were only used in virtual mode and had
> a single owner. We are going to change this by implementing in-kernel
> acceleration of DMA mapping requests. The proposed acceleration
> will handle requests in real mode and KVM will keep references to tables.
> 
> This adds a kref to iommu_table and defines new helpers to update it.
> This replaces iommu_free_table() with iommu_tce_table_put() and makes
> iommu_free_table() static. iommu_tce_table_get() is not used in this patch
> but it will be in the following patch.
> 
> Since this touches prototypes, this also removes @node_name parameter as
> it has never been really useful on powernv and carrying it for
> the pseries platform code to iommu_free_table() seems to be quite
> useless as well.
> 
> This should cause no behavioral change.
> 
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
> Reviewed-by: David Gibson <david at gibson.dropbear.id.au>
> Acked-by: Alex Williamson <alex.williamson at redhat.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/e5afdf9dd515a9446c009f44f99f9b

cheers