[PATCH v2 47/61] mm/gup: Use maple tree navigation instead of linked list
Liam Howlett
liam.howlett at oracle.com
Tue Aug 17 08:47:30 PDT 2021
From: "Liam R. Howlett" <Liam.Howlett at Oracle.com>
Signed-off-by: Liam R. Howlett <Liam.Howlett at Oracle.com>
---
mm/gup.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
index 2630ed1bb4f4..7a34765d28d8 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1580,7 +1580,6 @@ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors)
long ret = 0;
end = start + len;
-
for (nstart = start; nstart < end; nstart = nend) {
/*
* We want to fault in pages for [nstart; end) address range.
@@ -1589,10 +1588,10 @@ 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, start, end);
} else if (nstart >= vma->vm_end)
- vma = vma->vm_next;
- if (!vma || vma->vm_start >= end)
+ vma = vma_next(mm, vma);
+ if (!vma)
break;
/*
* Set [nstart; nend) to intersection of desired address
--
2.30.2
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