[PATCH 05/16] iommu/io-pgtable-arm-v7s: use page allocation function provided by iommu-pages.h

[Pasha Tatashin]

> >               kmem_cache_free(data->l2_tables, table);

We only account page allocations, not subpages, however, this is
something I was surprised about this particular architecture of why do
we allocate l2 using kmem ? Are the second level tables on arm v7s
really sub-page in size?

Pasha