cio_gp_dma_zalloc
void *cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev,
return cio_gp_dma_zalloc(cio_dma_pool, cio_get_dma_css_dev(), size);
cdev->private->dma_area = cio_gp_dma_zalloc(dma_pool, &cdev->dev,