1 files changed, 5 insertions, 22 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index f2481cb4e6b2..e73948afac70 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2574,32 +2574,13 @@ void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
 static void *s_start(struct seq_file *m, loff_t *pos)
         __acquires(&vmap_area_lock)
 {
-        loff_t n = *pos;
-        struct vmap_area *va;
-
         spin_lock(&vmap_area_lock);
-        va = list_first_entry(&vmap_area_list, typeof(*va), list);
-        while (n > 0 && &va->list != &vmap_area_list) {
-                n--;
-                va = list_next_entry(va, list);
-        }
-        if (!n && &va->list != &vmap_area_list)
-                return va;
-
-        return NULL;
-
+        return seq_list_start(&vmap_area_list, *pos);
 }
 
 static void *s_next(struct seq_file *m, void *p, loff_t *pos)
 {
-        struct vmap_area *va = p, *next;
-
-        ++*pos;
-        next = list_next_entry(va, list);
-        if (&next->list != &vmap_area_list)
-                return next;
-
-        return NULL;
+        return seq_list_next(p, &vmap_area_list, pos);
 }
 
 static void s_stop(struct seq_file *m, void *p)
@@ -2634,9 +2615,11 @@ static void show_numa_info(struct seq_file *m, struct vm_struct *v)
 
 static int s_show(struct seq_file *m, void *p)
 {
-        struct vmap_area *va = p;
+        struct vmap_area *va;
         struct vm_struct *v;
 
+        va = list_entry(p, struct vmap_area, list);
+
         /*
          * s_show can encounter race with remove_vm_area, !VM_VM_AREA on
          * behalf of vmap area is being tear down or vm_map_ram allocation.