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,
"Paul E. McKenney" <paulmck@kernel.org>,
Miguel Ojeda <ojeda@kernel.org>
Subject: [PATCH printk v6 01/30] printk: Add notation to console_srcu locking
Date: Mon, 27 May 2024 08:43:20 +0206 [thread overview]
Message-ID: <20240527063749.391035-2-john.ogness@linutronix.de> (raw)
In-Reply-To: <20240527063749.391035-1-john.ogness@linutronix.de>
kernel/printk/printk.c:284:5: sparse: sparse: context imbalance in
'console_srcu_read_lock' - wrong count at exit
include/linux/srcu.h:301:9: sparse: sparse: context imbalance in
'console_srcu_read_unlock' - unexpected unlock
Fixes: 6c4afa79147e ("printk: Prepare for SRCU console list protection")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
---
kernel/printk/printk.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 8de6a46a056c..6efb629fd976 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -282,6 +282,7 @@ EXPORT_SYMBOL(console_list_unlock);
* Return: A cookie to pass to console_srcu_read_unlock().
*/
int console_srcu_read_lock(void)
+ __acquires(&console_srcu)
{
return srcu_read_lock_nmisafe(&console_srcu);
}
@@ -295,6 +296,7 @@ EXPORT_SYMBOL(console_srcu_read_lock);
* Counterpart to console_srcu_read_lock()
*/
void console_srcu_read_unlock(int cookie)
+ __releases(&console_srcu)
{
srcu_read_unlock_nmisafe(&console_srcu, cookie);
}
--
2.39.2
next prev parent reply other threads:[~2024-05-27 6:38 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-27 6:37 [PATCH printk v6 00/30] wire up write_atomic() printing John Ogness
2024-05-27 6:37 ` John Ogness [this message]
2024-05-27 6:37 ` [PATCH printk v6 02/30] printk: Properly deal with nbcon consoles on seq init John Ogness
2024-05-27 6:37 ` [PATCH printk v6 03/30] printk: nbcon: Remove return value for write_atomic() John Ogness
2024-05-27 6:37 ` [PATCH printk v6 04/30] printk: Check printk_deferred_enter()/_exit() usage John Ogness
2024-05-27 6:37 ` [PATCH printk v6 05/30] printk: nbcon: Add detailed doc for write_atomic() John Ogness
2024-05-27 6:37 ` [PATCH printk v6 06/30] printk: nbcon: Add callbacks to synchronize with driver John Ogness
2024-05-27 6:37 ` [PATCH printk v6 07/30] printk: nbcon: Use driver synchronization while (un)registering John Ogness
2024-05-27 6:37 ` [PATCH printk v6 08/30] serial: core: Provide low-level functions to lock port John Ogness
2024-05-27 6:37 ` [PATCH printk v6 09/30] serial: core: Introduce wrapper to set @uart_port->cons John Ogness
2024-05-27 6:37 ` [PATCH printk v6 10/30] console: Improve console_srcu_read_flags() comments John Ogness
2024-05-27 6:37 ` [PATCH printk v6 11/30] nbcon: Add API to acquire context for non-printing operations John Ogness
2024-05-27 6:37 ` [PATCH printk v6 12/30] serial: core: Implement processing in port->lock wrapper John Ogness
2024-05-27 6:37 ` [PATCH printk v6 13/30] printk: nbcon: Do not rely on proxy headers John Ogness
2024-05-27 6:37 ` [PATCH printk v6 14/30] printk: nbcon: Fix kerneldoc for enums John Ogness
2024-05-27 6:37 ` [PATCH printk v6 15/30] printk: Make console_is_usable() available to nbcon John Ogness
2024-05-27 6:37 ` [PATCH printk v6 16/30] printk: Let console_is_usable() handle nbcon John Ogness
2024-05-27 6:37 ` [PATCH printk v6 17/30] printk: Add @flags argument for console_is_usable() John Ogness
2024-05-27 6:37 ` [PATCH printk v6 18/30] printk: nbcon: Add helper to assign priority based on CPU state John Ogness
2024-05-27 6:37 ` [PATCH printk v6 19/30] printk: nbcon: Provide function to flush using write_atomic() John Ogness
2024-05-28 9:30 ` Petr Mladek
2024-05-27 6:37 ` [PATCH printk v6 20/30] printk: Track registered boot consoles John Ogness
2024-05-27 6:37 ` [PATCH printk v6 21/30] printk: nbcon: Use nbcon consoles in console_flush_all() John Ogness
2024-05-27 6:37 ` [PATCH printk v6 22/30] printk: nbcon: Add unsafe flushing on panic John Ogness
2024-05-27 6:37 ` [PATCH printk v6 23/30] printk: Avoid console_lock dance if no legacy or boot consoles John Ogness
2024-05-27 6:37 ` [PATCH printk v6 24/30] printk: Track nbcon consoles John Ogness
2024-05-27 6:37 ` [PATCH printk v6 25/30] printk: Coordinate direct printing in panic John Ogness
2024-05-27 6:37 ` [PATCH printk v6 26/30] printk: nbcon: Implement emergency sections John Ogness
2024-05-28 9:57 ` Petr Mladek
2024-05-27 6:37 ` [PATCH printk v6 27/30] panic: Mark emergency section in warn John Ogness
2024-05-27 6:37 ` [PATCH printk v6 28/30] panic: Mark emergency section in oops John Ogness
2024-05-27 6:37 ` [PATCH printk v6 29/30] rcu: Mark emergency sections in rcu stalls John Ogness
2024-05-28 10:04 ` Petr Mladek
2024-05-27 6:37 ` [PATCH printk v6 30/30] lockdep: Mark emergency sections in lockdep splats John Ogness
2024-05-28 10:10 ` [PATCH printk v6 00/30] wire up write_atomic() printing Petr Mladek
2024-05-28 13:35 ` Petr Mladek
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