kernel/acct: Use maple tree iterators instead of linked list

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

diff --git a/kernel/acct.c b/kernel/acct.c
index 23a7ab8e6cbc8bdf68c0f46d8d09dfce07c5a6f5..32343edc7330bf6b324f5e237aa3dcb54010f90c 100644 (file)
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -534,16 +534,16 @@ void acct_collect(long exitcode, int group_dead)
        struct pacct_struct *pacct = &current->signal->pacct;
        u64 utime, stime;
        unsigned long vsize = 0;
+       MA_STATE(mas, &current->mm->mm_mt, 0, 0);
 
        if (group_dead && current->mm) {
                struct vm_area_struct *vma;
 
                mmap_read_lock(current->mm);
-               vma = current->mm->mmap;
-               while (vma) {
+               rcu_read_lock();
+               mas_for_each(&mas, vma, ULONG_MAX)
                        vsize += vma->vm_end - vma->vm_start;
-                       vma = vma->vm_next;
-               }
+               rcu_read_unlock();
                mmap_read_unlock(current->mm);
        }