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    Subject[PATCH v7 35/70] s390: Remove vma linked list walks
    Date
    From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

    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 99694260cac9..66f7e7c63632 100644
    --- a/arch/s390/kernel/vdso.c
    +++ b/arch/s390/kernel/vdso.c
    @@ -68,10 +68,11 @@ 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 af03cacf34ec..8a639487f840 100644
    --- a/arch/s390/mm/gmap.c
    +++ b/arch/s390/mm/gmap.c
    @@ -2508,8 +2508,9 @@ 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);
    @@ -2577,8 +2578,9 @@ 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)
    --
    2.34.1
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