[PATCH v4 50/66] mm/gup: Use maple tree navigation instead of linked list
Liam Howlett
liam.howlett at oracle.com
Wed Dec 1 06:30:13 PST 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 2c51e9748a6a..60892e5df6a2 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1570,7 +1570,6 @@ 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.
@@ -1579,10 +1578,10 @@ 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 = find_vma(mm, vma->vm_end);
+ if (!vma)
break;
/*
* Set [nstart; nend) to intersection of desired address
--
2.30.2
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