mm/pagewalk: use vma_find() instead of vma linked list

walk_page_range() no longer uses the one vma linked list reference.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Matthew Wilcox (Oracle) <[e-mail]>
Signed-off-by: Liam R. Howlett <[e-mail]>
Acked-by: Vlastimil Babka <[e-mail]>
Tested-by: Yu Zhao <[e-mail]>
Cc: Catalin Marinas <[e-mail]>
Cc: David Hildenbrand <[e-mail]>
Cc: David Howells <[e-mail]>
Cc: Davidlohr Bueso <[e-mail]>
Cc: SeongJae Park <[e-mail]>
Cc: Sven Schnelle <[e-mail]>
Cc: Will Deacon <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

mm/pagewalk.c

···
 		} else { /* inside vma */
 			walk.vma = vma;
 			next = min(end, vma->vm_end);
-			vma = vma->vm_next;
+			vma = find_vma(mm, vma->vm_end);
 
 			err = walk_page_test(start, next, &walk);
 			if (err > 0) {