add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/xen/xen-acpi-pad.c
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@@ -1,17 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * xen-acpi-pad.c - Xen pad interface
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  *
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  * Copyright (c) 2012, Intel Corporation.
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  *    Author: Liu, Jinsong <jinsong.liu@intel.com>
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms and conditions of the GNU General Public License,
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- * version 2, as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -19,6 +11,7 @@
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 #include <linux/kernel.h>
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 #include <linux/types.h>
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 #include <linux/acpi.h>
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+#include <xen/xen.h>
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 #include <xen/interface/version.h>
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 #include <xen/xen-ops.h>
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 #include <asm/xen/hypercall.h>