From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Thu, 14 Apr 2022 06:07:23 +0000 (-0700)
Subject: mm/swapfile: use vma iterator instead of vma linked list
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c41be4d5a2a09c996f6cb85e8b0f1528b5f57140;p=users%2Fjedix%2Flinux-maple.git

mm/swapfile: use vma iterator instead of vma linked list

unuse_mm() no longer needs to reference the linked list.

Link: https://lkml.kernel.org/r/20220404143501.2016403-65-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 9398e915b36b..3007031c0f5f 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1984,14 +1984,16 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type)
 {
 	struct vm_area_struct *vma;
 	int ret = 0;
+	VMA_ITERATOR(vmi, mm, 0);
 
 	mmap_read_lock(mm);
-	for (vma = mm->mmap; vma; vma = vma->vm_next) {
+	for_each_vma(vmi, vma) {
 		if (vma->anon_vma) {
 			ret = unuse_vma(vma, type);
 			if (ret)
 				break;
 		}
+
 		cond_resched();
 	}
 	mmap_read_unlock(mm);