[PATCH v13 34/70] s390: remove vma linked list walks

Liam Howlett
2022-08-22T15:10:09Z

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

Use the VMA iterator instead.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
---
arch/s390/kernel/vdso.c | 3 ++-
arch/s390/mm/gmap.c | 6 ++++--
2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 5075cde77b29..535099f2736d 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -69,10 +69,11 @@ static struct page *find_timens_vvar_page(struct vm_area_struct *vma)
int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
{
struct mm_struct *mm = task->mm;
+ VMA_ITERATOR(vmi, mm, 0);
struct vm_area_struct *vma;

mmap_read_lock(mm);
- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ for_each_vma(vmi, vma) {
unsigned long size = vma->vm_end - vma->vm_start;

if (!vma_is_special_mapping(vma, &vvar_mapping))
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 62758cb5872f..02d15c8dc92e 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -2515,8 +2515,9 @@ static const struct mm_walk_ops thp_split_walk_ops = {
static inline void thp_split_mm(struct mm_struct *mm)
{
struct vm_area_struct *vma;
+ VMA_ITERATOR(vmi, mm, 0);

- for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) {
+ for_each_vma(vmi, vma) {
vma->vm_flags &= ~VM_HUGEPAGE;
vma->vm_flags |= VM_NOHUGEPAGE;
walk_page_vma(vma, &thp_split_walk_ops, NULL);
@@ -2584,8 +2585,9 @@ int gmap_mark_unmergeable(void)
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
int ret;
+ VMA_ITERATOR(vmi, mm, 0);

- for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ for_each_vma(vmi, vma) {
ret = ksm_madvise(vma, vma->vm_start, vma->vm_end,
MADV_UNMERGEABLE, &vma->vm_flags);
if (ret)
--
2.35.1