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From: John Ogness <john.ogness@linutronix.de>
To: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel@vger.kernel.org
Subject: [PATCH printk 05/18] printk: Mark __printk percpu data ready __ro_after_init
Date: Sat, 24 Sep 2022 02:10:41 +0206	[thread overview]
Message-ID: <20220924000454.3319186-6-john.ogness@linutronix.de> (raw)
In-Reply-To: <20220924000454.3319186-1-john.ogness@linutronix.de>

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


  parent reply	other threads:[~2022-09-24  0:06 UTC|newest]

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-24  0:04 [PATCH printk 00/18] preparation for threaded/atomic printing John Ogness
2022-09-24  0:04 ` [PATCH printk 01/18] printk: Make pr_flush() static John Ogness
2022-09-26 14:12   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 02/18] printk: Declare log_wait properly John Ogness
2022-09-26 14:22   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 03/18] printk: Remove write only variable nr_ext_console_drivers John Ogness
2022-09-26 14:25   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 04/18] printk: Remove bogus comment vs. boot consoles John Ogness
2022-09-26 14:26   ` Petr Mladek
2022-09-24  0:04 ` John Ogness [this message]
2022-09-26 14:27   ` [PATCH printk 05/18] printk: Mark __printk percpu data ready __ro_after_init Petr Mladek
2022-09-24  0:04 ` [PATCH printk 06/18] printk: Protect [un]register_console() with a mutex John Ogness
2022-09-24  9:31   ` Sergey Senozhatsky
2022-09-27 15:16   ` Petr Mladek
2022-09-28  9:46     ` Sergey Senozhatsky
2022-09-28 23:42     ` John Ogness
2022-09-29 15:43       ` Petr Mladek
2022-09-30  9:24         ` Petr Mladek
2022-09-30 14:16           ` John Ogness
2022-09-30 18:04             ` Petr Mladek
2022-09-30 20:26               ` John Ogness
2022-10-03 14:37                 ` Petr Mladek
2022-10-03 19:35                   ` John Ogness
2022-10-04  2:06                     ` Sergey Senozhatsky
2022-10-04  7:28                     ` Petr Mladek
2022-09-30 13:30         ` John Ogness
2022-09-24  0:04 ` [PATCH printk 07/18] printk: Convert console list walks for readers to list lock John Ogness
2022-09-27 14:07   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 08/18] parisc: Put console abuse into one place John Ogness
2022-09-24  0:20   ` Steven Rostedt
2022-09-30  7:54   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 09/18] serial: kgdboc: Lock console list in probe function John Ogness
2022-09-28 23:32   ` Doug Anderson
2022-09-30  8:07   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 10/18] kgbd: Pretend that console list walk is safe John Ogness
2022-09-26  9:33   ` Aaron Tomlin
2022-09-28 23:32   ` Doug Anderson
2022-09-30  8:39     ` Petr Mladek
2022-09-30 13:44       ` John Ogness
2022-09-30 17:27         ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 11/18] printk: Convert console_drivers list to hlist John Ogness
2022-09-24 10:53   ` Sergey Senozhatsky
2022-09-24 17:20   ` Helge Deller
2022-09-25  0:43     ` Sergey Senozhatsky
2022-09-24 17:27   ` Helge Deller
2022-09-30 14:20   ` Petr Mladek
2022-09-30 16:53     ` Helge Deller
2022-09-30 19:46       ` John Ogness
2022-09-30 22:41         ` Helge Deller
2022-09-24  0:04 ` [PATCH printk 12/18] printk: Prepare for SCRU console list protection John Ogness
2022-09-24 10:58   ` Sergey Senozhatsky
2022-09-24  0:04 ` [PATCH printk 13/18] printk: Move buffer size defines John Ogness
2022-09-24 11:01   ` Sergey Senozhatsky
2022-10-07  9:11   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 14/18] printk: Document struct console John Ogness
2022-09-24 11:08   ` Sergey Senozhatsky
2022-10-07 11:57   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 15/18] printk: Add struct cons_text_buf John Ogness
2022-09-24 11:09   ` Sergey Senozhatsky
2022-10-07 15:15   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 16/18] printk: Use " John Ogness
2022-09-24 11:34   ` Sergey Senozhatsky
2022-10-10 10:11   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 17/18] printk: Use an output descriptor struct for emit John Ogness
2022-10-10 15:40   ` Petr Mladek
2022-09-24  0:04 ` [PATCH printk 18/18] printk: Handle dropped message smarter John Ogness
2022-09-26  4:19   ` Sergey Senozhatsky
2022-09-26  7:54     ` John Ogness
2022-09-26  9:18       ` Sergey Senozhatsky
2022-10-10 16:07       ` Petr Mladek
2022-09-26  9:22   ` Sergey Senozhatsky
2022-09-24  6:44 ` [PATCH printk 00/18] preparation for threaded/atomic printing Greg Kroah-Hartman
2022-09-25 15:23   ` John Ogness
2022-09-24  9:47 ` Sergey Senozhatsky
2022-09-29 16:33 ` Petr Mladek

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