[PATCH v5 64/70] mm/swapfile: Use vma iterator instead of vma linked list

From: Liam Howlett
Date: Tue Feb 01 2022 - 21:46:40 EST


From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>

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

Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
---
mm/swapfile.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index bf0df7aa7158..fc17e02f12c6 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2071,14 +2071,16 @@ 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);
--
2.34.1