mm/memcontrol.c: make the walk_page_range() limit obvious

[cascardo/linux.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5579e76..0739d41 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4681,7 +4681,8 @@ static unsigned long mem_cgroup_count_precharge(struct mm_struct *mm)
                .mm = mm,
        };
        down_read(&mm->mmap_sem);
-       walk_page_range(0, ~0UL, &mem_cgroup_count_precharge_walk);
+       walk_page_range(0, mm->highest_vm_end,
+                       &mem_cgroup_count_precharge_walk);
        up_read(&mm->mmap_sem);
 
        precharge = mc.precharge;
@@ -4969,7 +4970,8 @@ retry:
         * When we have consumed all precharges and failed in doing
         * additional charge, the page walk just aborts.
         */
-       walk_page_range(0, ~0UL, &mem_cgroup_move_charge_walk);
+       walk_page_range(0, mc.mm->highest_vm_end, &mem_cgroup_move_charge_walk);
+
        up_read(&mc.mm->mmap_sem);
        atomic_dec(&mc.from->moving_account);
 }