[PATCH v12 63/69] mm/swapfile: use vma iterator instead of vma linked list

Liam Howlett
2022-07-20T02:24:41Z

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

Link: https://lkml.kernel.org/r/20220504011345.662299-48-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20220621204632.3370049-64-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/swapfile.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index a2e66d855b19..ec4c1b276691 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1991,14 +1991,16 @@ 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);
--
2.35.1