diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 5938fa9..faf3d89 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -886,7 +886,7 @@ static int make_request(struct request_queue *q, struct bio * bio)
 	 */
 	raid10_find_phys(conf, r10_bio);
  retry_write:
-	blocked_rdev = 0;
+	blocked_rdev = NULL;
 	rcu_read_lock();
 	for (i = 0;  i < conf->copies; i++) {
 		int d = r10_bio->devs[i].devnum;
diff --git a/drivers/media/video/cx18/cx18-driver.c b/drivers/media/video/cx18/cx18-driver.c
index 8f5ed9b..3f55d47 100644
--- a/drivers/media/video/cx18/cx18-driver.c
+++ b/drivers/media/video/cx18/cx18-driver.c
@@ -613,7 +613,7 @@ static int __devinit cx18_probe(struct pci_dev *dev,
 	}
 
 	cx = kzalloc(sizeof(struct cx18), GFP_ATOMIC);
-	if (cx == 0) {
+	if (!cx) {
 		spin_unlock(&cx18_cards_lock);
 		return -ENOMEM;
 	}
diff --git a/sound/oss/kahlua.c b/sound/oss/kahlua.c
index dfe670f..eb9bc36 100644
--- a/sound/oss/kahlua.c
+++ b/sound/oss/kahlua.c
@@ -67,7 +67,7 @@ static int __devinit probe_one(struct pci_dev *pdev, const struct pci_device_id 
 		return 1;
 	
 	mem = ioremap(base, 128);
-	if(mem == 0UL)
+	if (!mem)
 		return 1;
 	map = readw(mem + 0x18);	/* Read the SMI enables */
 	iounmap(mem);