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Message-ID: <41cd78af-92a3-4f23-8c7a-4316a04a66d8@p183>
Date: Mon, 5 Feb 2024 13:01:19 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] cpu: mark cpu_possible_mask as __ro_after_init
cpu_possible_mask is by definition "cpus which could be hotplugged
without reboot" -- property which is fixed after kernel enumerates
motheboard capabilities and hardware configuration.
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
kernel/cpu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -3107,10 +3107,10 @@ const DECLARE_BITMAP(cpu_all_bits, NR_CPUS) = CPU_BITS_ALL;
EXPORT_SYMBOL(cpu_all_bits);
#ifdef CONFIG_INIT_ALL_POSSIBLE
-struct cpumask __cpu_possible_mask __read_mostly
+struct cpumask __cpu_possible_mask __ro_after_init;
= {CPU_BITS_ALL};
#else
-struct cpumask __cpu_possible_mask __read_mostly;
+struct cpumask __cpu_possible_mask __ro_after_init;
#endif
EXPORT_SYMBOL(__cpu_possible_mask);
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