(*->vm_end - *->vm_start) >> PAGE_SHIFT operation is implemented
as a inline funcion vma_pages() in linux/mm.h, so using it.
Signed-off-by: Libin <huawei.libin@xxxxxxxxxx>
---
drivers/char/mspec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index e1f60f9..ed0703f 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -168,7 +168,7 @@ mspec_close(struct vm_area_struct *vma)
if (!atomic_dec_and_test(&vdata->refcnt))
return;
- last_index = (vdata->vm_end - vdata->vm_start) >> PAGE_SHIFT;
+ last_index = vma_pages(vdata);
for (index = 0; index < last_index; index++) {
if (vdata->maddr[index] == 0)
continue;
--
1.8.2.1
--
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