From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Mon, 5 Feb 2024 10:01:19 +0000 (+0300)
Subject: cpu: Mark cpu_possible_mask as __ro_after_init
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=da92df490eea;p=linux.git

cpu: Mark cpu_possible_mask as __ro_after_init

cpu_possible_mask is by definition "cpus which could be hotplugged without
reboot". It's a property which is fixed after kernel enumerates the
hardware configuration.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/41cd78af-92a3-4f23-8c7a-4316a04a66d8@p183
---

diff --git a/kernel/cpu.c b/kernel/cpu.c
index ad7d0b00bce99..7b36b3a4e3365 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -3106,10 +3106,10 @@ 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);