add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/connector/connector.c
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@@ -1,22 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *	connector.c
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  *
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  * 2004+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
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  * All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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  */
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 #include <linux/compiler.h>
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@@ -210,17 +197,12 @@
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 		    void (*callback)(struct cn_msg *,
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 				     struct netlink_skb_parms *))
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 {
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-	int err;
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 	struct cn_dev *dev = &cdev;
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 	if (!cn_already_initialized)
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 		return -EAGAIN;
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-	err = cn_queue_add_callback(dev->cbdev, name, id, callback);
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-	if (err)
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-		return err;
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-
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-	return 0;
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+	return cn_queue_add_callback(dev->cbdev, name, id, callback);
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 }
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 EXPORT_SYMBOL_GPL(cn_add_callback);
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@@ -261,16 +243,12 @@
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 	return 0;
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 }
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-static struct cn_dev cdev = {
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-	.input   = cn_rx_skb,
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-};
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-
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 static int cn_init(void)
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 {
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 	struct cn_dev *dev = &cdev;
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 	struct netlink_kernel_cfg cfg = {
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 		.groups	= CN_NETLINK_USERS + 0xf,
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-		.input	= dev->input,
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+		.input	= cn_rx_skb,
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 	};
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 	dev->nls = netlink_kernel_create(&init_net, NETLINK_CONNECTOR, &cfg);