[Intel-gfx] [PATCH] softdog: Obey hardlockup_all_cpu_backtrace sysctl

[Daniel Vetter]

This is used by the nmi watchdog, but also useful by the softdog when
we're trying to figure out where exactly we're stuck.

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Imre Deak <imre.deak at intel.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=103160
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

---

FIXME: Take the && 1 out once CI is configured to enable this.
-Daniel
---
 drivers/watchdog/softdog.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/watchdog/softdog.c b/drivers/watchdog/softdog.c
index 060740625485..3a1606011b17 100644
--- a/drivers/watchdog/softdog.c
+++ b/drivers/watchdog/softdog.c
@@ -63,6 +63,8 @@ static enum hrtimer_restart softdog_fire(struct hrtimer *timer)
 		pr_crit("Triggered - Reboot ignored\n");
 	} else if (soft_panic) {
 		pr_crit("Initiating panic\n");
+		if (sysctl_hardlockup_all_cpu_backtrace && 1)
+			trigger_allbutself_cpu_backtrace();
 		panic("Software Watchdog Timer expired");
 	} else {
 		pr_crit("Initiating system reboot\n");
-- 
2.14.1