[PATCH v6 28/71] mm: Convert vma_lookup() to use mtree_load()

[Liam Howlett]

From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>

Unlike the rbtree, the Maple Tree will return a NULL if there's
nothing at a particular address.

Since the previous commit dropped the vmacache, it is now possible to
consult the tree directly.

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
 include/linux/mm.h | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 72654108380e..c57d23b9564c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2802,12 +2802,7 @@ extern struct vm_area_struct *find_vma_intersection(struct mm_struct *mm,
 static inline
 struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr)
 {
-	struct vm_area_struct *vma = find_vma(mm, addr);
-
-	if (vma && addr < vma->vm_start)
-		vma = NULL;
-
-	return vma;
+	return mtree_load(&mm->mm_mt, addr);
 }
 
 static inline unsigned long vm_start_gap(struct vm_area_struct *vma)
-- 
2.34.1