[74/94] mm/gup: Use maple tree navigation instead of linked list
diff mbox series

Message ID 20210428153542.2814175-75-Liam.Howlett@Oracle.com
State New, archived
Headers show
Series
  • Introducing the Maple Tree
Related show

Commit Message

Liam Howlett April 28, 2021, 3:36 p.m. UTC
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 mm/gup.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Patch
diff mbox series

diff --git a/mm/gup.c b/mm/gup.c
index 48fe98ab0729..4acb0aa75d80 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1502,6 +1502,7 @@  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;
 
@@ -1513,10 +1514,10 @@  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