From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Mon, 3 Aug 2020 00:27:36 +0000 (-0400)
Subject: mm/mmap: Zero maple tree area in a single set when detatching
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=36cb1e4d7ae210a60dc9628db54ce9ea255d8929;p=users%2Fjedix%2Flinux-maple.git

mm/mmap: Zero maple tree area in a single set when detatching

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

diff --git a/mm/mmap.c b/mm/mmap.c
index d176e0405111..4444324151d0 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2520,8 +2520,8 @@ detach_vmas_to_be_unmapped(struct mm_struct *mm, struct vm_area_struct *vma,
 
 	insertion_point = (prev ? &prev->vm_next : &mm->mmap);
 	vma->vm_prev = NULL;
+	vma_mt_szero(mm, vma->vm_start, end);
 	do {
-		vma_mt_erase(mm, vma);
 		mm->map_count--;
 		tail_vma = vma;
 		vma = vma->vm_next;