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    Subject[PATCH v7 36/70] x86: 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/x86/entry/vdso/vma.c | 9 +++++----
    1 file changed, 5 insertions(+), 4 deletions(-)

    diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
    index 235a5794296a..3883da001c62 100644
    --- a/arch/x86/entry/vdso/vma.c
    +++ b/arch/x86/entry/vdso/vma.c
    @@ -127,17 +127,17 @@ int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
    {
    struct mm_struct *mm = task->mm;
    struct vm_area_struct *vma;
    + VMA_ITERATOR(vmi, mm, 0);

    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))
    zap_page_range(vma, vma->vm_start, size);
    }
    -
    mmap_read_unlock(mm);
    +
    return 0;
    }
    #else
    @@ -354,6 +354,7 @@ int map_vdso_once(const struct vdso_image *image, unsigned long addr)
    {
    struct mm_struct *mm = current->mm;
    struct vm_area_struct *vma;
    + VMA_ITERATOR(vmi, mm, 0);

    mmap_write_lock(mm);
    /*
    @@ -363,7 +364,7 @@ int map_vdso_once(const struct vdso_image *image, unsigned long addr)
    * We could search vma near context.vdso, but it's a slowpath,
    * so let's explicitly check all VMAs to be completely sure.
    */
    - for (vma = mm->mmap; vma; vma = vma->vm_next) {
    + for_each_vma(vmi, vma) {
    if (vma_is_special_mapping(vma, &vdso_mapping) ||
    vma_is_special_mapping(vma, &vvar_mapping)) {
    mmap_write_unlock(mm);
    --
    2.34.1
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