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 <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Link: https://lore.kernel.org/r/41cd78af-92a3-4f23-8c7a-4316a04a66d8@p183
wafgo · Feb 19, 2024 · da92df4 · da92df4
1 parent effe6d2
commit da92df4
Showing 1 changed file with 2 additions and 2 deletions.
diff --git 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);