diff options
| author | Libin <huawei.libin@huawei.com> | 2013-07-03 15:01:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:07:26 -0700 |
| commit | 52c2dad914ca3ac84926106d95ddf47de2f40b45 (patch) | |
| tree | bed4ad81c3d8e8c169da070b63155578dd9b3b37 /drivers/uio/uio.c | |
| parent | ef9f515a4c38c759c56c7d1e760cc243b6d516f4 (diff) | |
| download | linux-52c2dad914ca3ac84926106d95ddf47de2f40b45.tar.bz2 | |
uio: 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>
Diffstat (limited to 'drivers/uio/uio.c')
| -rw-r--r-- | drivers/uio/uio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index b645c47501b4..3b96f18593b3 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -677,7 +677,7 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma) if (mi < 0) return -EINVAL; - requested_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + requested_pages = vma_pages(vma); actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK) + idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT; if (requested_pages > actual_pages) |