From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Mon, 1 Mar 2021 19:01:06 +0000 (-0500)
Subject: mm: Add vma_lookup()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b38999dc36ebecaa4ce2706693da6fdcfa5ac866;p=users%2Fjedix%2Flinux-maple.git

mm: Add vma_lookup()

Walk the maple tree to find the requested address.

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

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5afa228f04a9..d06743e1e05c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2669,6 +2669,13 @@ static inline struct vm_area_struct *vma_prev(struct mm_struct *mm,
 	return mas_prev(&mas, 0);
 }
 
+static inline
+struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr)
+{
+       return mtree_load(&mm->mm_mt, addr);
+}
+
+
 static inline unsigned long vm_start_gap(struct vm_area_struct *vma)
 {
 	unsigned long vm_start = vma->vm_start;