enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/arch/arm/mach-vexpress/platsmp.c
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@@ -1,12 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  linux/arch/arm/mach-vexpress/platsmp.c
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  *
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  *  Copyright (C) 2002 ARM Ltd.
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  *  All Rights Reserved
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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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 #include <linux/init.h>
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 #include <linux/errno.h>
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@@ -82,6 +79,13 @@
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 	vexpress_flags_set(__pa_symbol(versatile_secondary_startup));
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 }
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+#ifdef CONFIG_HOTPLUG_CPU
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+static void vexpress_cpu_die(unsigned int cpu)
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+{
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+	versatile_immitation_cpu_die(cpu, 0x40);
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+}
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+#endif
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+
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 const struct smp_operations vexpress_smp_dt_ops __initconst = {
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 	.smp_prepare_cpus	= vexpress_smp_dt_prepare_cpus,
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 	.smp_secondary_init	= versatile_secondary_init,