linux-kernel - [tip: smp/core] cpu: Mark cpu_possible_mask as __ro_after

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Date: Mon, 19 Feb 2024 17:16:04 -0000
From: "tip-bot2 for Alexey Dobriyan" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Alexey Dobriyan <adobriyan@...il.com>,
 Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: smp/core] cpu: Mark cpu_possible_mask as __ro_after_init

The following commit has been merged into the smp/core branch of tip:

Commit-ID:     da92df490eeab7a97a3390ff32e0ae091e0dc2eb
Gitweb:        https://git.kernel.org/tip/da92df490eeab7a97a3390ff32e0ae091e0dc2eb
Author:        Alexey Dobriyan <adobriyan@...il.com>
AuthorDate:    Mon, 05 Feb 2024 13:01:19 +03:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 19 Feb 2024 18:05:47 +01:00

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

---
 kernel/cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index ad7d0b0..7b36b3a 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);