diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 2df5cf4..e4a2f8f 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1810,7 +1810,7 @@
 
 	size = sizeof(s->disckey.value) + 4;
 
-	if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL)
+	if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
 		return -ENOMEM;
 
 	init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
@@ -1861,7 +1861,7 @@
 
 	size = sizeof(s->manufact.value) + 4;
 
-	if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL)
+	if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
 		return -ENOMEM;
 
 	init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
@@ -2849,7 +2849,7 @@
 		/* FIXME: we need upper bound checking, too!! */
 		if (lba < 0)
 			return -EINVAL;
-		cgc.buffer = (char *) kmalloc(blocksize, GFP_KERNEL);
+		cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
 		if (cgc.buffer == NULL)
 			return -ENOMEM;
 		memset(&sense, 0, sizeof(sense));
@@ -3031,7 +3031,7 @@
 		int size = sizeof(dvd_struct);
 		if (!CDROM_CAN(CDC_DVD))
 			return -ENOSYS;
-		if ((s = (dvd_struct *) kmalloc(size, GFP_KERNEL)) == NULL)
+		if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
 			return -ENOMEM;
 		cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 
 		if (copy_from_user(s, (dvd_struct __user *)arg, size)) {