top_sg 224 drivers/iommu/virtio-iommu.c struct scatterlist top_sg, bottom_sg; top_sg 225 drivers/iommu/virtio-iommu.c struct scatterlist *sg[2] = { &top_sg, &bottom_sg }; top_sg 245 drivers/iommu/virtio-iommu.c sg_init_one(&top_sg, req->buf, write_offset);