uio: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

(*->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>

authored by

Libin and committed by

Linus Torvalds 12 years ago 52c2dad9 ef9f515a

+1 -1

1 changed file

expand all

drivers

uio

uio.c

+1 -1

drivers/uio/uio.c

··· 677 677 if (mi < 0) 678 678 return -EINVAL; 679 679 680 - requested_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; 680 + requested_pages = vma_pages(vma); 681 681 actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK) 682 682 + idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT; 683 683 if (requested_pages > actual_pages)