uml: remove unneeded void * cast

vmalloc() returns a void pointer, so casting to (void *) is pretty pointless.
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/um/drivers/ubd_kern.c

@@ -615,7 +615,7 @@ static int ubd_open_dev(struct ubd *ubd_dev)
 		blk_queue_max_sectors(ubd_dev->queue, 8 * sizeof(long));
 
 		err = -ENOMEM;
-		ubd_dev->cow.bitmap = (void *) vmalloc(ubd_dev->cow.bitmap_len);
+		ubd_dev->cow.bitmap = vmalloc(ubd_dev->cow.bitmap_len);
 		if(ubd_dev->cow.bitmap == NULL){
 			printk(KERN_ERR "Failed to vmalloc COW bitmap\n");
 			goto error;