ncpfs: 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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c
index ee24df5af1f929671ae0c6d8145d7951e767fc17..3c5dd55d284ce3baa24d3f2c4071ca53e883a223 100644 (file)
--- a/fs/ncpfs/mmap.c
+++ b/fs/ncpfs/mmap.c
@@ -117,7 +117,7 @@ int ncp_mmap(struct file *file, struct vm_area_struct *vma)
                return -EINVAL;
        /* we do not support files bigger than 4GB... We eventually 
           supports just 4GB... */
-       if (((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff 
+       if (vma_pages(vma) + vma->vm_pgoff
           > (1U << (32 - PAGE_SHIFT)))
                return -EFBIG;