Stefano Stabellini d50582e06f
xen/arm: remove mach_to_phys rbtree ...
Remove the rbtree used to keep track of machine to physical mappings:
the frontend can grant the same page multiple times, leading to errors
inserting or removing entries from the mach_to_phys tree.
Linux only needed to know the physical address corresponding to a given
machine address in swiotlb-xen. Now that swiotlb-xen can call the
xen_dma_* functions passing the machine address directly, we can remove
it.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com >
Tested-by: Denis Schneider <v1ne2go@gmail.com >
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d50582e06f