add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/kernel/setup.h
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@@ -1,12 +1,8 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Prototypes for functions that are shared between setup_(32|64|common).c
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  *
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  * Copyright 2016 Michael Ellerman, IBM Corporation.
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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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 #ifndef __ARCH_POWERPC_KERNEL_SETUP_H
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@@ -39,7 +35,7 @@
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 static inline void exc_lvl_early_init(void) { };
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 #endif
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-#ifdef CONFIG_PPC64
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+#if defined(CONFIG_PPC64) || defined(CONFIG_VMAP_STACK)
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 void emergency_stack_init(void);
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 #else
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 static inline void emergency_stack_init(void) { };