tree dc5bb8f208778ebe0aee0054b7af516a36e2b543
parent c5395d5c4a82159889cb650de93b591ea51d8c56
author David Woodhouse <David.Woodhouse@intel.com> 1246211540 +0100
committer David Woodhouse <David.Woodhouse@intel.com> 1246279157 +0100

intel-iommu: Performance improvement for dma_pte_clear_range()

It's a bit silly to repeatedly call domain_flush_cache() for each PTE
individually, as we clear it. Instead, batch them up and flush a whole
range at a time. We might as well refrain from recalculating the PTE
address from scratch each time round the loop too.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>