MAINTAINERS: add entry for dma mapping helpers

[Christoph Hellwig]

This code has been spread between getting in through arch trees, the iommu
tree, -mm and the drivers tree.  There will be a lot of work in this area,
including consolidating various arch implementations into more common
code, so ensure we have a proper git tree that facilitates cooperation with
the architecture maintainers.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 MAINTAINERS | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 09b5ab6a8a5c..56859d53a424 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2595,6 +2595,19 @@ S:	Maintained
 F:	net/bluetooth/
 F:	include/net/bluetooth/
 
+DMA MAPPING HELPERS
+M:	Christoph Hellwig <hch@xxxxxx>
+L:	linux-kernel@xxxxxxxxxxxxxxx
+T:	git git://git.infradead.org/users/hch/dma-mapping.git
+W:	http://git.infradead.org/users/hch/dma-mapping.git
+S:	Supported
+F:	lib/dma-debug.c
+F:	lib/dma-noop.c
+F:	lib/dma-virt.c
+F:	drivers/base/dma-mapping.c
+F:	drivers/base/dma-coherent.c
+F:	include/linux/dma-mapping.h
+
 BONDING DRIVER
 M:	Jay Vosburgh <j.vosburgh@xxxxxxxxx>
 M:	Veaceslav Falico <vfalico@xxxxxxxxx>
-- 
2.11.0