Driver-Core: extend devnode callbacks to provide permissions

This allows subsytems to provide devtmpfs with non-default permissions
for the device node. Instead of the default mode of 0600, null, zero,
random, urandom, full, tty, ptmx now have a mode of 0666, which allows
non-privileged processes to access standard device nodes in case no
other userspace process applies the expected permissions.

This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/class/usblp.c

@@ -1057,14 +1057,14 @@ static const struct file_operations usblp_fops = {
 	.release =	usblp_release,
 };
 
-static char *usblp_nodename(struct device *dev)
+static char *usblp_devnode(struct device *dev, mode_t *mode)
 {
 	return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
 }
 
 static struct usb_class_driver usblp_class = {
 	.name =		"lp%d",
-	.nodename =	usblp_nodename,
+	.devnode =	usblp_devnode,
 	.fops =		&usblp_fops,
 	.minor_base =	USBLP_MINOR_BASE,
 };