From e3e12f52b214121840b44c91de5b3e5af5d3eb84 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 06 Nov 2023 03:04:41 +0000
Subject: [PATCH] rk3568 rt init
---
kernel/kernel/watchdog_hld.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/kernel/kernel/watchdog_hld.c b/kernel/kernel/watchdog_hld.c
index 7138116..6854433 100644
--- a/kernel/kernel/watchdog_hld.c
+++ b/kernel/kernel/watchdog_hld.c
@@ -24,6 +24,8 @@
static DEFINE_PER_CPU(bool, watchdog_nmi_touch);
static DEFINE_PER_CPU(struct perf_event *, watchdog_ev);
static DEFINE_PER_CPU(struct perf_event *, dead_event);
+static DEFINE_RAW_SPINLOCK(watchdog_output_lock);
+
static struct cpumask dead_events_mask;
static unsigned long hardlockup_allcpu_dumped;
@@ -134,6 +136,13 @@
/* only print hardlockups once */
if (__this_cpu_read(hard_watchdog_warn) == true)
return;
+ /*
+ * If early-printk is enabled then make sure we do not
+ * lock up in printk() and kill console logging:
+ */
+ printk_kill();
+
+ raw_spin_lock(&watchdog_output_lock);
pr_emerg("Watchdog detected hard LOCKUP on cpu %d", this_cpu);
print_modules();
@@ -151,6 +160,7 @@
!test_and_set_bit(0, &hardlockup_allcpu_dumped))
trigger_allbutself_cpu_backtrace();
+ raw_spin_unlock(&watchdog_output_lock);
if (hardlockup_panic)
nmi_panic(regs, "Hard LOCKUP");
--
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