mm/gup: Use maple tree navigation instead of linked list

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>

diff --git a/mm/gup.c b/mm/gup.c
index 886d6148d3d03afbce35cdc7352c928d00c003bc..7702989c5715578947a4851a5486c35849c83a31 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1568,7 +1568,6 @@ 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.
@@ -1577,10 +1576,10 @@ 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