[PATCH 5/7] mm/interval_tree.c: Export vma interval tree iterators

[Alex Williamson <alex.williamson@redhat.com>]

In order to make use of vma_interval_tree_foreach() from a module
we need to export the first and next interators.  vfio code would
like to use this foreach helper to create a remapping helper,
essentially the reverse of unmap_mapping_range() for specific vmas
mapping vfio device memory.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
 mm/interval_tree.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/interval_tree.c b/mm/interval_tree.c
index 32e390c42c53..faa50767496c 100644
--- a/mm/interval_tree.c
+++ b/mm/interval_tree.c
@@ -24,6 +24,9 @@ INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.rb,
 		     unsigned long, shared.rb_subtree_last,
 		     vma_start_pgoff, vma_last_pgoff, /* empty */, vma_interval_tree)
 
+EXPORT_SYMBOL_GPL(vma_interval_tree_iter_first);
+EXPORT_SYMBOL_GPL(vma_interval_tree_iter_next);
+
 /* Insert node immediately after prev in the interval tree */
 void vma_interval_tree_insert_after(struct vm_area_struct *node,
 				    struct vm_area_struct *prev,