Use the new aural error reporting framework to signal kernel bugs. Emit the sound at the end of the __warn(), so the WARN_* are all covered. If panic_on_warn is set, panic() will play its sound and never return, so there is no risk to emit two sounds or the wrong one.
Signed-off-by: Matteo Croce <[email protected]> --- kernel/panic.c | 18 ++++++++++++++++++ lib/Kconfig.debug | 10 ++++++++++ 2 files changed, 28 insertions(+) diff --git a/kernel/panic.c b/kernel/panic.c index 360578e092e7..b87c4403924d 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -81,6 +81,22 @@ static struct note panic_sound[] = { }; #endif +#ifdef CONFIG_AUDIBLE_WARN +static struct note warn_sound[] = { + { 440, 400 }, + { 440, 300 }, + { 440, 100 }, + { 440, 400 }, + { 523, 300 }, + { 494, 100 }, + { 494, 300 }, + { 440, 100 }, + { 440, 300 }, + { 440, 100 }, + { 440, 800 }, +}; +#endif + static long no_blink(int state) { return 0; @@ -609,6 +625,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint, /* Just a warning, don't kill lockdep. */ add_taint(taint, LOCKDEP_STILL_OK); + + play(warn_sound, ARRAY_SIZE(warn_sound)); } #ifdef WANT_WARN_ON_SLOWPATH diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index e5d187dfc74a..909c271d283b 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1007,6 +1007,16 @@ config AUDIBLE_PANIC the system buzzer and not via any soundcard. Not available on all platforms. +config AUDIBLE_WARN + bool "Aural warning" + select PLAY_LIB + default n + help + If you say Y here, warnings will play a sound just + after the stacktrace and registers dump. The sound is played via + the system buzzer and not via any soundcard. + Not available on all platforms. + config SCHED_DEBUG bool "Collect scheduler debugging info" depends on DEBUG_KERNEL && PROC_FS -- 2.20.1
