add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/include/asm/swiotlb.h
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@@ -1,11 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Copyright (C) 2009 Becky Bruce, Freescale Semiconductor
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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 of  the GNU General  Public License as published by the
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- * Free Software Foundation;  either version 2 of the  License, or (at your
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- * option) any later version.
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- *
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  */
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 #ifndef __ASM_SWIOTLB_H
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@@ -13,12 +8,7 @@
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 #include <linux/swiotlb.h>
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-extern const struct dma_map_ops powerpc_swiotlb_dma_ops;
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-
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 extern unsigned int ppc_swiotlb_enable;
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-int __init swiotlb_setup_bus_notifier(void);
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-
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-extern void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev);
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 #ifdef CONFIG_SWIOTLB
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 void swiotlb_detect_4g(void);