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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, Miguel Ojeda <ojeda@kernel.org>,
	"Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH printk v7 01/35] printk: Add notation to console_srcu locking
Date: Sun,  4 Aug 2024 02:57:04 +0206	[thread overview]
Message-ID: <20240804005138.3722656-2-john.ogness@linutronix.de> (raw)
In-Reply-To: <20240804005138.3722656-1-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 054c0e7784fd..b3a4c0363a96 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


  reply	other threads:[~2024-08-04  0:51 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-04  0:51 [PATCH printk v7 00/35] wire up write_atomic() printing John Ogness
2024-08-04  0:51 ` John Ogness [this message]
2024-08-04  0:51 ` [PATCH printk v7 02/35] printk: nbcon: Consolidate alloc() and init() John Ogness
2024-08-05 14:39   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 03/35] printk: Properly deal with nbcon consoles on seq init John Ogness
2024-08-04  0:51 ` [PATCH printk v7 04/35] printk: Check printk_deferred_enter()/_exit() usage John Ogness
2024-08-04  0:51 ` [PATCH printk v7 05/35] printk: nbcon: Clarify rules of the owner/waiter matching John Ogness
2024-08-04  0:51 ` [PATCH printk v7 06/35] printk: nbcon: Remove return value for write_atomic() John Ogness
2024-08-04  0:51 ` [PATCH printk v7 07/35] printk: nbcon: Add detailed doc " John Ogness
2024-08-04  0:51 ` [PATCH printk v7 08/35] printk: nbcon: Add callbacks to synchronize with driver John Ogness
2024-08-04  0:51 ` [PATCH printk v7 09/35] printk: nbcon: Use driver synchronization while (un)registering John Ogness
2024-08-04  0:51 ` [PATCH printk v7 10/35] serial: core: Provide low-level functions to lock port John Ogness
2024-08-04  0:51 ` [PATCH printk v7 11/35] serial: core: Introduce wrapper to set @uart_port->cons John Ogness
2024-08-04  0:51 ` [PATCH printk v7 12/35] console: Improve console_srcu_read_flags() comments John Ogness
2024-08-04  0:51 ` [PATCH printk v7 13/35] nbcon: Add API to acquire context for non-printing operations John Ogness
2024-08-04  0:51 ` [PATCH printk v7 14/35] serial: core: Acquire nbcon context in port->lock wrapper John Ogness
2024-08-04  0:51 ` [PATCH printk v7 15/35] printk: nbcon: Do not rely on proxy headers John Ogness
2024-08-04  0:51 ` [PATCH printk v7 16/35] printk: Make console_is_usable() available to nbcon.c John Ogness
2024-08-04  0:51 ` [PATCH printk v7 17/35] printk: Let console_is_usable() handle nbcon John Ogness
2024-08-04  0:51 ` [PATCH printk v7 18/35] printk: Add @flags argument for console_is_usable() John Ogness
2024-08-04  0:51 ` [PATCH printk v7 19/35] printk: nbcon: Add helper to assign priority based on CPU state John Ogness
2024-08-04  0:51 ` [PATCH printk v7 20/35] printk: nbcon: Provide function to flush using write_atomic() John Ogness
2024-08-05 14:59   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 21/35] printk: Track registered boot consoles John Ogness
2024-08-04  0:51 ` [PATCH printk v7 22/35] printk: nbcon: Use nbcon consoles in console_flush_all() John Ogness
2024-08-04  0:51 ` [PATCH printk v7 23/35] printk: Add is_printk_legacy_deferred() John Ogness
2024-08-05 15:03   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 24/35] printk: nbcon: Flush new records on device_release() John Ogness
2024-08-05 15:31   ` Petr Mladek
2024-08-07  1:15     ` John Ogness
2024-08-07 12:48       ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 25/35] printk: Flush nbcon consoles first on panic John Ogness
2024-08-06  8:31   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 26/35] printk: nbcon: Add unsafe flushing " John Ogness
2024-08-04  0:51 ` [PATCH printk v7 27/35] printk: Avoid console_lock dance if no legacy or boot consoles John Ogness
2024-08-06  8:40   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 28/35] printk: Track nbcon consoles John Ogness
2024-08-04  0:51 ` [PATCH printk v7 29/35] printk: Coordinate direct printing in panic John Ogness
2024-08-06  9:59   ` Petr Mladek
2024-08-06 17:29     ` Linus Torvalds
2024-08-06 12:17   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 30/35] printk: Add helper for flush type logic John Ogness
2024-08-07 11:39   ` Petr Mladek
2024-08-07 14:11     ` John Ogness
2024-08-08  9:03       ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 31/35] printk: nbcon: Implement emergency sections John Ogness
2024-08-07 12:52   ` Petr Mladek
2024-08-04  0:51 ` [PATCH printk v7 32/35] panic: Mark emergency section in warn John Ogness
2024-08-04  0:51 ` [PATCH printk v7 33/35] panic: Mark emergency section in oops John Ogness
2024-08-04  0:51 ` [PATCH printk v7 34/35] rcu: Mark emergency sections in rcu stalls John Ogness
2024-08-04  0:51 ` [PATCH printk v7 35/35] lockdep: Mark emergency sections in lockdep splats John Ogness

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