[PATCH v7 52/70] mm/gup: Use maple tree navigation instead of linked list

Liam Howlett
2022-04-04T14:40:05Z

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 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
--
2.34.1