Add the initialization function to create restricted DMA pools from
matching reserved-memory nodes in the device tree.

Signed-off-by: Claire Chang <redacted>
---
 include/linux/device.h  |   4 ++
 include/linux/swiotlb.h |   7 +-
 kernel/dma/Kconfig      |   1 +
 kernel/dma/swiotlb.c    | 144 ++++++++++++++++++++++++++++++++++------
 4 files changed, 131 insertions(+), 25 deletions(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index 89bb8b84173e..ca6f71ec8871 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h

@@ -413,6 +413,7 @@ struct dev_links_info {
  * @dma_pools:	Dma pools (if dma'ble device).
  * @dma_mem:	Internal for coherent mem override.
  * @cma_area:	Contiguous memory area for dma allocations
+ * @dma_io_tlb_mem: Internal for swiotlb io_tlb_mem override.