add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/arc/include/asm/io.h
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@@ -1,9 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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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 version 2 as
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- * published by the Free Software Foundation.
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  */
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 #ifndef _ASM_ARC_IO_H
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@@ -35,11 +32,7 @@
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 {
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 }
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-extern void iounmap(const void __iomem *addr);
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-
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-#define ioremap_nocache(phy, sz)	ioremap(phy, sz)
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-#define ioremap_wc(phy, sz)		ioremap(phy, sz)
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-#define ioremap_wt(phy, sz)		ioremap(phy, sz)
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+extern void iounmap(const volatile void __iomem *addr);
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 /*
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  * io{read,write}{16,32}be() macros