use sg helper function in DMA mapping documentation

Signed-off-by: Saeed Bishara <saeed.bishara@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/Documentation/DMA-mapping.txt b/Documentation/DMA-mapping.txt
index e07f253..6883921 100644 (file)
--- a/Documentation/DMA-mapping.txt
+++ b/Documentation/DMA-mapping.txt
@@ -514,7 +514,7 @@ With scatterlists, you map a region gathered from several regions by:
        int i, count = pci_map_sg(dev, sglist, nents, direction);
        struct scatterlist *sg;
 
-       for (i = 0, sg = sglist; i < count; i++, sg++) {
+       for_each_sg(sglist, sg, count, i) {
                hw_address[i] = sg_dma_address(sg);
                hw_len[i] = sg_dma_len(sg);
        }