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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/arm64/kernel/psci.c
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@@ -1,12 +1,5 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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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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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  *
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  * Copyright (C) 2013 ARM Limited
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  *
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@@ -24,7 +17,6 @@
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 #include <uapi/linux/psci.h>
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-#include <asm/compiler.h>
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 #include <asm/cpu_ops.h>
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 #include <asm/errno.h>
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 #include <asm/smp_plat.h>
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@@ -55,6 +47,11 @@
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 }
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 #ifdef CONFIG_HOTPLUG_CPU
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+static bool cpu_psci_cpu_can_disable(unsigned int cpu)
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+{
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+	return !psci_tos_resident_on(cpu);
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+}
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+
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 static int cpu_psci_cpu_disable(unsigned int cpu)
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 {
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 	/* Fail early if we don't have CPU_OFF support */
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@@ -114,14 +111,11 @@
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 const struct cpu_operations cpu_psci_ops = {
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 	.name		= "psci",
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-#ifdef CONFIG_CPU_IDLE
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-	.cpu_init_idle	= psci_cpu_init_idle,
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-	.cpu_suspend	= psci_cpu_suspend_enter,
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-#endif
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 	.cpu_init	= cpu_psci_cpu_init,
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 	.cpu_prepare	= cpu_psci_cpu_prepare,
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 	.cpu_boot	= cpu_psci_cpu_boot,
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 #ifdef CONFIG_HOTPLUG_CPU
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+	.cpu_can_disable = cpu_psci_cpu_can_disable,
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 	.cpu_disable	= cpu_psci_cpu_disable,
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 	.cpu_die	= cpu_psci_cpu_die,
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 	.cpu_kill	= cpu_psci_cpu_kill,