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From: John Ogness <john.ogness@linutronix.de>
Date: Mon, 9 Oct 2023 13:55:19 +0000
Subject: [PATCH 16/50] printk: Add sparse notation to console_srcu locking
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.7/older/patches-6.7-rt6.tar.xz
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
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 6c4afa79147e ("printk: Prepare for SRCU console list protection")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
kernel/printk/printk.c | 2 ++
1 file changed, 2 insertions(+)
--- 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);
}
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