[PATCH v13 51/70] mm/gup: use maple tree navigation instead of linked list

Liam Howlett
2022-08-22T15:11:50Z

From: "Liam R. Howlett" <Liam.Howlett@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@Oracle.com>
---
mm/gup.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index 5aa7531a703b..d54676448470 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1667,10 +1667,11 @@ 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