diff --git a/include/linux/console.h b/include/linux/console.h index 73bab0f58af5c9ddf455881de6bb00124c9948dd..c0e08d6ad6cac0dbd3945e5e9844671134aa37ae 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -167,6 +167,7 @@ static inline void console_sysfs_notify(void) { } #endif extern bool console_suspend_enabled; +extern int is_console_suspended(void); /* Suspend and resume console messages over PM events */ extern void suspend_console(void); diff --git a/kernel/panic.c b/kernel/panic.c index 449a10219cbe9735dd02164f241a643c475b6777..9b13790b57439b812b7bdf212d9638d42a110f39 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -8,6 +8,7 @@ * This function is used through-out the kernel (including mm and fs) * to indicate a major problem. */ +#include <linux/console.h> #include <linux/debug_locks.h> #include <linux/interrupt.h> #include <linux/kmsg_dump.h> @@ -132,6 +133,10 @@ void panic(const char *fmt, ...) */ smp_send_stop(); + /* print last_kmsg even after console suspend */ + if (is_console_suspended()) + resume_console(); + kmsg_dump(KMSG_DUMP_PANIC); atomic_notifier_call_chain(&panic_notifier_list, 0, buf); diff --git a/kernel/printk.c b/kernel/printk.c index f4a94dd7b1db3fda4a1d043039b3a8da1bc005d0..76103c2a7cb596b7cd5e57c83a19bd8aa23352a5 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -2155,6 +2155,12 @@ module_param_named(console_suspend, console_suspend_enabled, MODULE_PARM_DESC(console_suspend, "suspend console during suspend" " and hibernate operations"); +/* check current suspend/resume status of the console */ +int is_console_suspended(void) +{ + return console_suspended; +} + /** * suspend_console - suspend the console subsystem *