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    Subject[PATCH 5/6] drm: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT
    Date
    (*->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>
    ---
    drivers/gpu/drm/ttm/ttm_bo_vm.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
    index 74705f3..3df9f16 100644
    --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
    +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
    @@ -147,7 +147,7 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)

    page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
    bo->vm_node->start - vma->vm_pgoff;
    - page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) +
    + page_last = vma_pages(vma) +
    bo->vm_node->start - vma->vm_pgoff;

    if (unlikely(page_offset >= bo->num_pages)) {
    @@ -258,7 +258,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,

    read_lock(&bdev->vm_lock);
    bo = ttm_bo_vm_lookup_rb(bdev, vma->vm_pgoff,
    - (vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
    + vma_pages(vma));
    if (likely(bo != NULL) && !kref_get_unless_zero(&bo->kref))
    bo = NULL;
    read_unlock(&bdev->vm_lock);
    --
    1.8.2.1



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