mm: pagewalk: don't check vma in walk_page_range_novma()

Directly call walk_pgd_range() as that is everything that will actually
happen in __walk_page_range() besides checking if the vma is set.

Link: https://lkml.kernel.org/r/21585888.EfDdHjke4D@devpool047
Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index 4d5ce5bce1903eddd61833eb4a8091d8df3d518d..21f76871e85458b523123ec67f946c84dd72f604 100644 (file)
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -517,7 +517,7 @@ int walk_page_range_novma(struct mm_struct *mm, unsigned long start,
 
        mmap_assert_locked(walk.mm);
 
-       return __walk_page_range(start, end, &walk);
+       return walk_pgd_range(start, end, &walk);
 }
 
 int walk_page_vma(struct vm_area_struct *vma, const struct mm_walk_ops *ops,