powerpc: Use maple tree iterator for vdso.

remove vma->vm_next and use the maple tree mas_for_each iterator.

Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>

diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 717f2c9a7573cf395d41c338de1a99fb8d65fbf8..2cf975a1fe5491b251e966609c9b29a041043c1b 100644 (file)
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -114,11 +114,11 @@ struct vdso_data *arch_get_vdso_data(void *vvar_page)
 int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
 {
        struct mm_struct *mm = task->mm;
+       MA_STATE(mas, &mm->mm_mt, 0, 0);
        struct vm_area_struct *vma;
 
        mmap_read_lock(mm);
-
-       for (vma = mm->mmap; vma; vma = vma->vm_next) {
+       mas_for_each(&mas, vma, ULONG_MAX) {
                unsigned long size = vma->vm_end - vma->vm_start;
 
                if (vma_is_special_mapping(vma, &vvar_spec))