diff mbox series

[v2,52/70] mm/gup: Use maple tree navigation instead of linked list

Message ID 20210112161240.2024684-53-Liam.Howlett@Oracle.com (mailing list archive)
State New, archived
Headers show
Series RFC mm: Introducing the Maple Tree | expand

Commit Message

Liam R. Howlett Jan. 12, 2021, 4:12 p.m. UTC 
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 mm/gup.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/mm/gup.c b/mm/gup.c
index b06e2a6d90187..20392efb2d9ba 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1465,6 +1465,7 @@  int __mm_populate(unsigned long start, unsigned long len, int ignore_errors)
 	struct vm_area_struct *vma = NULL;
 	int locked = 0;
 	long ret = 0;
+	MA_STATE(mas, &mm->mm_mt, start, start);
 
 	end = start + len;
 
@@ -1476,10 +1477,10 @@  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 = mas_find(&mas, end);
 		} else if (nstart >= vma->vm_end)
-			vma = vma->vm_next;
-		if (!vma || vma->vm_start >= end)
+			vma = mas_next(&mas, end);
+		if (!vma)
 			break;
 		/*
 		 * Set [nstart; nend) to intersection of desired address