riscv: use vma iterator for vdso

Remove the linked list use in favour of the vma iterator.

Link: https://lkml.kernel.org/r/20220404143501.2016403-68-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/riscv/kernel/vdso.c b/arch/riscv/kernel/vdso.c
index a9436a65161a4f29b048e88343107792345ebfec..20e2ae135fb9f6097b31dca0e1e0c25211fe699a 100644 (file)
--- a/arch/riscv/kernel/vdso.c
+++ b/arch/riscv/kernel/vdso.c
@@ -116,10 +116,11 @@ 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, vdso_info.dm))