diff options
Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0125-printk-nbcon-Stop-threads-on-shutdown-reboot.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/debian/patches-rt/0125-printk-nbcon-Stop-threads-on-shutdown-reboot.patch b/debian/patches-rt/0125-printk-nbcon-Stop-threads-on-shutdown-reboot.patch new file mode 100644 index 0000000000..55ec76c5c0 --- /dev/null +++ b/debian/patches-rt/0125-printk-nbcon-Stop-threads-on-shutdown-reboot.patch @@ -0,0 +1,60 @@ +From: John Ogness <john.ogness@linutronix.de> +Date: Tue, 26 Sep 2023 13:04:15 +0000 +Subject: [PATCH 125/134] printk: nbcon: Stop threads on shutdown/reboot +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz + +Register a syscore_ops shutdown function to stop all threaded +printers on shutdown/reboot. This allows printk to transition back +to atomic printing in order to provide a robust mechanism for +outputting the final messages. + +Signed-off-by: John Ogness <john.ogness@linutronix.de> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + kernel/printk/nbcon.c | 31 +++++++++++++++++++++++++++++++ + 1 file changed, 31 insertions(+) + +--- a/kernel/printk/nbcon.c ++++ b/kernel/printk/nbcon.c +@@ -8,6 +8,7 @@ + #include <linux/kthread.h> + #include <linux/slab.h> + #include <linux/serial_core.h> ++#include <linux/syscore_ops.h> + #include "printk_ringbuffer.h" + #include "internal.h" + /* +@@ -1577,3 +1578,33 @@ void nbcon_release(struct uart_port *up) + con->locked_port = false; + } + EXPORT_SYMBOL_GPL(nbcon_release); ++ ++/** ++ * printk_kthread_shutdown - shutdown all threaded printers ++ * ++ * On system shutdown all threaded printers are stopped. This allows printk ++ * to transition back to atomic printing, thus providing a robust mechanism ++ * for the final shutdown/reboot messages to be output. ++ */ ++static void printk_kthread_shutdown(void) ++{ ++ struct console *con; ++ ++ console_list_lock(); ++ for_each_console(con) { ++ if (con->flags & CON_NBCON) ++ nbcon_kthread_stop(con); ++ } ++ console_list_unlock(); ++} ++ ++static struct syscore_ops printk_syscore_ops = { ++ .shutdown = printk_kthread_shutdown, ++}; ++ ++static int __init printk_init_ops(void) ++{ ++ register_syscore_ops(&printk_syscore_ops); ++ return 0; ++} ++device_initcall(printk_init_ops); |