[PATCH v9 51/69] mm/gup: use maple tree navigation instead of linked list

[Liam Howlett]

From: "Liam R. Howlett" <Liam.Howlett at Oracle.com>

Use find_vma_intersection() to locate the VMAs in __mm_populate() instead
of using find_vma() and the linked list.

Signed-off-by: Liam R. Howlett <Liam.Howlett at Oracle.com>
---
 mm/gup.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index f598a037eb04..28fd5d5aa557 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1533,10 +1533,11 @@ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors)
 		if (!locked) {
 			locked = 1;
 			mmap_read_lock(mm);
-			vma = find_vma(mm, nstart);
+			vma = find_vma_intersection(mm, nstart, end);
 		} else if (nstart >= vma->vm_end)
-			vma = vma->vm_next;
-		if (!vma || vma->vm_start >= end)
+			vma = find_vma_intersection(mm, vma->vm_end, end);
+
+		if (!vma)
 			break;
 		/*
 		 * Set [nstart; nend) to intersection of desired address
-- 
2.35.1