- bio = bio_map_kern(q, kbuf, len, gfp_mask);
+ kaddr = (unsigned long)kbuf;
+ alignment = queue_dma_alignment(q) | q->dma_pad_mask;
+ do_copy = ((kaddr & alignment) || (len & alignment));
+
+ if (do_copy)
+ bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading);
+ else
+ bio = bio_map_kern(q, kbuf, len, gfp_mask);
+