From 8bc72b819e1e173065c6d1cbc6cdcb06590fe3e4 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@kernel.org>
Date: Mon, 26 Feb 2024 12:07:31 +0100
Subject: [PATCH] smp: Provide 'setup_max_cpus' definition on UP too
commit 3c2f8859ae1ce53f2a89c8e4ca4092101afbff67 upstream.
This was already defined locally by init/main.c, but let's make
it generic, as arch/x86/kernel/cpu/topology.c is going to make
use of it to have more uniform code.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/smp.h | 2 ++
init/main.c | 1 -
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/smp.h b/include/linux/smp.h
index a80ab58ae3f1d..5b977f20c1399 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -211,6 +211,8 @@ smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
static inline void kick_all_cpus_sync(void) { }
static inline void wake_up_all_idle_cpus(void) { }
+#define setup_max_cpus 0
+
#ifdef CONFIG_UP_LATE_INIT
extern void __init up_late_init(void);
static inline void smp_init(void) { up_late_init(); }
diff --git a/init/main.c b/init/main.c
index 2c339793511b5..e46aa00b3c997 100644
--- a/init/main.c
+++ b/init/main.c
@@ -607,7 +607,6 @@ static int __init rdinit_setup(char *str)
__setup("rdinit=", rdinit_setup);
#ifndef CONFIG_SMP
-static const unsigned int setup_max_cpus = NR_CPUS;
static inline void setup_nr_cpu_ids(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#endif
--
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