return IRQ_HANDLED;
 }
 
-void s3cmci_dma_done_callback(struct s3c2410_dma_chan *dma_ch, void *buf_id,
-                             int size, enum s3c2410_dma_buffresult result)
+static void s3cmci_dma_done_callback(struct s3c2410_dma_chan *dma_ch,
+                                    void *buf_id, int size,
+                                    enum s3c2410_dma_buffresult result)
 {
        struct s3cmci_host *host = buf_id;
        unsigned long iflags;
        mmc_request_done(host->mmc, mrq);
 }
 
-
-void s3cmci_dma_setup(struct s3cmci_host *host, enum s3c2410_dmasrc source)
+static void s3cmci_dma_setup(struct s3cmci_host *host,
+                            enum s3c2410_dmasrc source)
 {
        static enum s3c2410_dmasrc last_source = -1;
        static int setup_ok;
        }
 
        host->base = ioremap(host->mem->start, RESSIZE(host->mem));
-       if (host->base == 0) {
+       if (!host->base) {
                dev_err(&pdev->dev, "failed to ioremap() io memory region.\n");
                ret = -EINVAL;
                goto probe_free_mem_region;