[PATCH v2 0/4] iommu/iova: Solve longterm IOVA issue

[John Garry]

This series contains a patch to solve the longterm IOVA issue which
leizhen originally tried to address at [0].

Along with this, I included the following:
- A smaller helper to clear all IOVAs for a domain
- Change polarity of the IOVA magazine helpers
- Small optimisation from Cong Wang included, which was never applied [1].
  There was some debate of the other patches in that series, but this one
  is quite straightforward.

Differences to v1:
- Add IOVA clearing helper
- Add patch to change polarity of mag helpers
- Avoid logically-redundant extra variable in __iova_rcache_insert()

[0] https://lore.kernel.org/linux-iommu/20190815121104.29140-3-thunder.leizhen@xxxxxxxxxx/
[1] https://lore.kernel.org/linux-iommu/4b74d40a-22d1-af53-fcb6-5d70183705a8@xxxxxxxxxx/

Cong Wang (1):
  iommu: avoid taking iova_rbtree_lock twice

John Garry (3):
  iommu/iova: Add free_all_cpu_cached_iovas()
  iommu/iova: Avoid double-negatives in magazine helpers
  iommu/iova: Flush CPU rcache for when a depot fills

 drivers/iommu/iova.c | 66 +++++++++++++++++++++++++-------------------
 1 file changed, 38 insertions(+), 28 deletions(-)

-- 
2.26.2