percpu: use bitmap_clear

Use bitmap_clear rather than clearing individual bits in a memory region.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/mm/percpu-vm.c b/mm/percpu-vm.c
index 12a48a8..405d331 100644 (file)
--- a/mm/percpu-vm.c
+++ b/mm/percpu-vm.c
@@ -184,8 +184,7 @@ static void pcpu_unmap_pages(struct pcpu_chunk *chunk,
                                   page_end - page_start);
        }
 
-       for (i = page_start; i < page_end; i++)
-               __clear_bit(i, populated);
+       bitmap_clear(populated, page_start, page_end - page_start);
 }
 
 /**