preparation for threaded/atomic printing

[PATCH printk 05/18] printk: Mark __printk percpu data ready __ro_after_init

Posted by John Ogness 3 years, 6 months ago

From: Thomas Gleixner <tglx@linutronix.de>

This variable cannot change post boot.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
---
 kernel/printk/printk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 770511b89504..e4f1e7478b52 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -430,7 +430,7 @@ static struct printk_ringbuffer *prb = &printk_rb_static;
  * per_cpu_areas are initialised. This variable is set to true when
  * it's safe to access per-CPU data.
  */
-static bool __printk_percpu_data_ready __read_mostly;
+static bool __printk_percpu_data_ready __ro_after_init;
 
 bool printk_percpu_data_ready(void)
 {
-- 
2.30.2

Re: [PATCH printk 05/18] printk: Mark __printk percpu data ready __ro_after_init

Posted by Petr Mladek 3 years, 6 months ago

On Sat 2022-09-24 02:10:41, John Ogness wrote:
> From: Thomas Gleixner <tglx@linutronix.de>
> 
> This variable cannot change post boot.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: John Ogness <john.ogness@linutronix.de>
> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>

Reviewed-by: Petr Mladek <pmladek@suse.com>

Best Regards,
Petr