diff --git a/sound/oss/es1371.c b/sound/oss/es1371.c
index 2562f47..ddf6b0a 100644
--- a/sound/oss/es1371.c
+++ b/sound/oss/es1371.c
@@ -1102,7 +1102,7 @@
 
 static irqreturn_t es1371_interrupt(int irq, void *dev_id)
 {
-        struct es1371_state *s = (struct es1371_state *)dev_id;
+        struct es1371_state *s = dev_id;
 	unsigned int intsrc, sctl;
 	
 	/* fastpath out, to ease interrupt sharing */
diff --git a/sound/oss/hal2.c b/sound/oss/hal2.c
index 7807aba..784bdd7 100644
--- a/sound/oss/hal2.c
+++ b/sound/oss/hal2.c
@@ -372,7 +372,7 @@
 
 static irqreturn_t hal2_interrupt(int irq, void *dev_id)
 {
-	struct hal2_card *hal2 = (struct hal2_card*)dev_id;
+	struct hal2_card *hal2 = dev_id;
 	irqreturn_t ret = IRQ_NONE;
 
 	/* decide what caused this interrupt */
diff --git a/sound/oss/i810_audio.c b/sound/oss/i810_audio.c
index a48af87..240cc79 100644
--- a/sound/oss/i810_audio.c
+++ b/sound/oss/i810_audio.c
@@ -1525,7 +1525,7 @@
 
 static irqreturn_t i810_interrupt(int irq, void *dev_id)
 {
-	struct i810_card *card = (struct i810_card *)dev_id;
+	struct i810_card *card = dev_id;
 	u32 status;
 
 	spin_lock(&card->lock);
diff --git a/sound/oss/mpu401.c b/sound/oss/mpu401.c
index 58d4a5d..e962205 100644
--- a/sound/oss/mpu401.c
+++ b/sound/oss/mpu401.c
@@ -435,7 +435,7 @@
 static irqreturn_t mpuintr(int irq, void *dev_id)
 {
 	struct mpu_config *devc;
-	int dev = (int) dev_id;
+	int dev = (int)(unsigned long) dev_id;
 	int handled = 0;
 
 	devc = &dev_conf[dev];
diff --git a/sound/oss/vwsnd.c b/sound/oss/vwsnd.c
index 0cd4d6e..6dfb9f4 100644
--- a/sound/oss/vwsnd.c
+++ b/sound/oss/vwsnd.c
@@ -2235,7 +2235,7 @@
 
 static irqreturn_t vwsnd_audio_intr(int irq, void *dev_id)
 {
-	vwsnd_dev_t *devc = (vwsnd_dev_t *) dev_id;
+	vwsnd_dev_t *devc = dev_id;
 	unsigned int status;
 
 	DBGEV("(irq=%d, dev_id=0x%p)\n", irq, dev_id);