From: Matthew Wilcox (Oracle) <willy@infradead.org>
Date: Fri, 29 Oct 2021 01:53:09 +0000 (-0400)
Subject: mm: Convert vma_lookup() to use the Maple Tree
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a35e0ed19ff9792c0b53c9e7dcd7ccd4bdcd17d1;p=users%2Fjedix%2Flinux-maple.git

mm: Convert vma_lookup() to use the Maple Tree

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

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ec549a985e69..6717446d2f81 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2739,12 +2739,7 @@ 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)