On Thu, 7 Jan 2021 12:43:59 +0800
Keqian Zhu <zhukeqian1@xxxxxxxxxx> wrote:
> We always use the smallest supported page size of vfio_iommu as
> pgsize. Remove parameter "pgsize" of vfio_dma_bitmap_alloc_all.
>
> Signed-off-by: Keqian Zhu <zhukeqian1@xxxxxxxxxx>
> ---
> drivers/vfio/vfio_iommu_type1.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
> index b596c482487b..080c05b129ee 100644
> --- a/drivers/vfio/vfio_iommu_type1.c
> +++ b/drivers/vfio/vfio_iommu_type1.c
> @@ -236,9 +236,10 @@ static void vfio_dma_populate_bitmap(struct vfio_dma *dma, size_t pgsize)
> }
> }
>
> -static int vfio_dma_bitmap_alloc_all(struct vfio_iommu *iommu, size_t pgsize)
> +static int vfio_dma_bitmap_alloc_all(struct vfio_iommu *iommu)
> {
> struct rb_node *n;
> + size_t pgsize = (size_t)1 << __ffs(iommu->pgsize_bitmap);
>
> for (n = rb_first(&iommu->dma_list); n; n = rb_next(n)) {
> struct vfio_dma *dma = rb_entry(n, struct vfio_dma, node);
> @@ -2761,12 +2762,9 @@ static int vfio_iommu_type1_dirty_pages(struct vfio_iommu *iommu,
> return -EINVAL;
>
> if (dirty.flags & VFIO_IOMMU_DIRTY_PAGES_FLAG_START) {
> - size_t pgsize;
> -
> mutex_lock(&iommu->lock);
> - pgsize = 1 << __ffs(iommu->pgsize_bitmap);
> if (!iommu->dirty_page_tracking) {
> - ret = vfio_dma_bitmap_alloc_all(iommu, pgsize);
> + ret = vfio_dma_bitmap_alloc_all(iommu);
> if (!ret)
> iommu->dirty_page_tracking = true;
> }
This just moves the same calculation from one place to another, what's
the point? Thanks,
Alex
