The patch titled
Subject: uio: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT
has been added to the -mm tree. Its filename is
uio-use-vma_pages-to-replace-vm_end-vm_start-page_shift.patch
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------------------------------------------------------
From: Libin <huawei.libin@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/uio/uio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/uio/uio.c~uio-use-vma_pages-to-replace-vm_end-vm_start-page_shift drivers/uio/uio.c
--- a/drivers/uio/uio.c~uio-use-vma_pages-to-replace-vm_end-vm_start-page_shift
+++ a/drivers/uio/uio.c
@@ -677,7 +677,7 @@ static int uio_mmap(struct file *filep,
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)
_
Patches currently in -mm which might be from huawei.libin@xxxxxxxxxx are
origin.patch
mm-use-vma_pages-to-replace-vm_end-vm_start-page_shift.patch
ncpfs-use-vma_pages-to-replace-vm_end-vm_start-page_shift.patch
char-use-vma_pages-to-replace-vm_end-vm_start-page_shift.patch
uio-use-vma_pages-to-replace-vm_end-vm_start-page_shift.patch
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