cx18_init_power(cx, 1);
        cx18_init_memory(cx);
 
-       cx->scb = (struct cx18_scb *)(cx->enc_mem + SCB_OFFSET);
+       cx->scb = (struct cx18_scb __iomem *)(cx->enc_mem + SCB_OFFSET);
        cx18_init_scb(cx);
 
        cx18_gpio_init(cx);
 
        u32 v4l2_cap;           /* V4L2 capabilities of card */
        u32 hw_flags;           /* Hardware description of the board */
        unsigned mdl_offset;
-       struct cx18_scb *scb;   /* pointer to SCB */
+       struct cx18_scb __iomem *scb;   /* pointer to SCB */
 
        struct cx18_av_state av_state;
 
 
                                cx18_enqueue(s, buf, &s->q_free);
                                cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5,
                                        s->handle,
-                                       (void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
+                                       (void __iomem *)&cx->scb->cpu_mdl[buf->id] -
+                                         cx->enc_mem,
                                        1, buf->id, s->buf_size);
                        } else
                                cx18_enqueue(s, buf, &s->q_io);
 
 
                        cx18_buf_sync_for_device(s, buf);
                        cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
-                           (void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
+                           (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
                            1, buf->id, s->buf_size);
                } else
                        set_bit(CX18_F_B_NEED_BUF_SWAP, &buf->b_flags);
 
        return NULL;
 }
 
-static struct cx18_mailbox *cx18_mb_is_complete(struct cx18 *cx, int rpu,
+static struct cx18_mailbox __iomem *cx18_mb_is_complete(struct cx18 *cx, int rpu,
                u32 *state, u32 *irq, u32 *req)
 {
-       struct cx18_mailbox *mb = NULL;
+       struct cx18_mailbox __iomem *mb = NULL;
        int wait_count = 0;
        u32 ack;
 
 long cx18_mb_ack(struct cx18 *cx, const struct cx18_mailbox *mb)
 {
        const struct cx18_api_info *info = find_api_info(mb->cmd);
-       struct cx18_mailbox *ack_mb;
+       struct cx18_mailbox __iomem *ack_mb;
        u32 ack_irq;
        u8 rpu = CPU;
 
 {
        const struct cx18_api_info *info = find_api_info(cmd);
        u32 state = 0, irq = 0, req, oldreq, err;
-       struct cx18_mailbox *mb;
+       struct cx18_mailbox __iomem *mb;
        wait_queue_head_t *waitq;
        int timeout = 100;
        int cnt = 0;
 
        }
 
        cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
-               (void *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
-               (void *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
+               (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
+               (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 
        list_for_each(p, &s->q_free.list) {
                struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
                writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
                writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
                cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
-                       (void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, 1,
-                       buf->id, s->buf_size);
+                       (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
+                       1, buf->id, s->buf_size);
        }
        /* begin_capture */
        if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {