add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/bridge/br_sysfs_if.c
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@@ -1,14 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *	Sysfs attributes of bridge ports
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  *	Linux ethernet bridge
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  *
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  *	Authors:
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  *	Stephen Hemminger		<shemminger@osdl.org>
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- *
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- *	This program is free software; you can redistribute it and/or
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- *	modify it under the terms of the GNU General Public License
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- *	as published by the Free Software Foundation; either version
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- *	2 of the License, or (at your option) any later version.
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  */
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 #include <linux/capability.h>
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@@ -322,9 +318,6 @@
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 	if (!rtnl_trylock())
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 		return restart_syscall();
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-
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-	if (!p->dev || !p->br)
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-		goto out_unlock;
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 	if (brport_attr->store_raw) {
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 		char *buf_copy;