[PATCH 3/6] 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 --- fs/ncpfs/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c index ee24df5..3c5dd55 100644 --- 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;