Use the new aural error reporting framework to signal kernel panic. The
error sound is emitted between the stack dump and the kexec jump.
Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxx>
---
kernel/panic.c | 25 +++++++++++++++++++++++++
lib/Kconfig.debug | 10 ++++++++++
2 files changed, 35 insertions(+)
diff --git a/kernel/panic.c b/kernel/panic.c
index 0ae0d7332f12..360578e092e7 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -29,6 +29,7 @@
#include <linux/bug.h>
#include <linux/ratelimit.h>
#include <linux/debugfs.h>
+#include <linux/play.h>
#include <asm/sections.h>
#define PANIC_TIMER_STEP 100
@@ -57,6 +58,29 @@ ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
EXPORT_SYMBOL(panic_notifier_list);
+#ifdef CONFIG_AUDIBLE_PANIC
+static struct note panic_sound[] = {
+ { 784, 400 },
+ { 784, 400 },
+ { 784, 400 },
+ { 622, 300 },
+ { 932, 100 },
+ { 784, 400 },
+ { 622, 300 },
+ { 932, 100 },
+ { 784, 800 },
+ { 1174, 400 },
+ { 1174, 400 },
+ { 1174, 400 },
+ { 1244, 300 },
+ { 932, 100 },
+ { 740, 400 },
+ { 622, 300 },
+ { 932, 100 },
+ { 784, 800 },
+};
+#endif
+
static long no_blink(int state)
{
return 0;
@@ -213,6 +237,7 @@ void panic(const char *fmt, ...)
if (!test_taint(TAINT_DIE) && oops_in_progress <= 1)
dump_stack();
#endif
+ play(panic_sound, ARRAY_SIZE(panic_sound));
/*
* If we have crashed and we have a crash kernel loaded let it handle
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 10d04b266aef..e5d187dfc74a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -997,6 +997,16 @@ config PLAY_LIB
depends on HAVE_PCSPKR_PLATFORM
default n
+config AUDIBLE_PANIC
+ bool "Aural panic"
+ select PLAY_LIB
+ default n
+ help
+ If you say Y here, kernel panics 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
