Hi Souptick, On 2018-11-15 16:50, Souptick Joarder wrote: > Convert to use vm_insert_range to map range of kernel memory > to user vma. > > Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx> > Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxx> Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > --- > drivers/media/common/videobuf2/videobuf2-dma-sg.c | 23 +++++++---------------- > 1 file changed, 7 insertions(+), 16 deletions(-) > > diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c > index 015e737..898adef 100644 > --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c > +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c > @@ -328,28 +328,19 @@ static unsigned int vb2_dma_sg_num_users(void *buf_priv) > static int vb2_dma_sg_mmap(void *buf_priv, struct vm_area_struct *vma) > { > struct vb2_dma_sg_buf *buf = buf_priv; > - unsigned long uaddr = vma->vm_start; > - unsigned long usize = vma->vm_end - vma->vm_start; > - int i = 0; > + unsigned long page_count = vma_pages(vma); > + int err; > > if (!buf) { > printk(KERN_ERR "No memory to map\n"); > return -EINVAL; > } > > - do { > - int ret; > - > - ret = vm_insert_page(vma, uaddr, buf->pages[i++]); > - if (ret) { > - printk(KERN_ERR "Remapping memory, error: %d\n", ret); > - return ret; > - } > - > - uaddr += PAGE_SIZE; > - usize -= PAGE_SIZE; > - } while (usize > 0); > - > + err = vm_insert_range(vma, vma->vm_start, buf->pages, page_count); > + if (err) { > + printk(KERN_ERR "Remapping memory, error: %d\n", err); > + return err; > + } > > /* > * Use common vm_area operations to track buffer refcount. Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland