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printk: Add notation to console_srcu locking

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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: 6c4afa7914 ("printk: Prepare for SRCU console list protection")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/20240820063001.36405-2-john.ogness@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
John Ogness 2024-08-20 08:35:27 +02:06 committed by Petr Mladek
parent b0da640826
commit eda25860bf
1 changed files with 2 additions and 0 deletions
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2
kernel/printk/printk.c
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@ -282,6 +282,7 @@ EXPORT_SYMBOL(console_list_unlock);
* Return: A cookie to pass to console_srcu_read_unlock(). * Return: A cookie to pass to console_srcu_read_unlock().
*/ */
int console_srcu_read_lock(void) int console_srcu_read_lock(void)
__acquires(&console_srcu)
{ {
return srcu_read_lock_nmisafe(&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() * Counterpart to console_srcu_read_lock()
*/ */
void console_srcu_read_unlock(int cookie) void console_srcu_read_unlock(int cookie)
__releases(&console_srcu)
{ {
srcu_read_unlock_nmisafe(&console_srcu, cookie); srcu_read_unlock_nmisafe(&console_srcu, cookie);
} }