[PATCH 4/6] char: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT

(*->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@huawei.com --- 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;