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-rw-r--r--debian/patches-rt/0120-lockdep-Mark-emergency-section-in-lockdep-splats.patch45
1 files changed, 45 insertions, 0 deletions
diff --git a/debian/patches-rt/0120-lockdep-Mark-emergency-section-in-lockdep-splats.patch b/debian/patches-rt/0120-lockdep-Mark-emergency-section-in-lockdep-splats.patch
new file mode 100644
index 0000000000..248d17afc2
--- /dev/null
+++ b/debian/patches-rt/0120-lockdep-Mark-emergency-section-in-lockdep-splats.patch
@@ -0,0 +1,45 @@
+From: John Ogness <john.ogness@linutronix.de>
+Date: Mon, 18 Sep 2023 20:27:41 +0000
+Subject: [PATCH 120/134] lockdep: Mark emergency section in lockdep splats
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
+
+Mark an emergency section within print_usage_bug(), where
+lockdep bugs are printed. In this section, the CPU will not
+perform console output for the printk() calls. Instead, a
+flushing of the console output will triggered when exiting
+the emergency section.
+
+Signed-off-by: John Ogness <john.ogness@linutronix.de>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ kernel/locking/lockdep.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/kernel/locking/lockdep.c
++++ b/kernel/locking/lockdep.c
+@@ -56,6 +56,7 @@
+ #include <linux/kprobes.h>
+ #include <linux/lockdep.h>
+ #include <linux/context_tracking.h>
++#include <linux/console.h>
+
+ #include <asm/sections.h>
+
+@@ -3971,6 +3972,8 @@ print_usage_bug(struct task_struct *curr
+ if (!debug_locks_off() || debug_locks_silent)
+ return;
+
++ nbcon_cpu_emergency_enter();
++
+ pr_warn("\n");
+ pr_warn("================================\n");
+ pr_warn("WARNING: inconsistent lock state\n");
+@@ -3999,6 +4002,8 @@ print_usage_bug(struct task_struct *curr
+
+ pr_warn("\nstack backtrace:\n");
+ dump_stack();
++
++ nbcon_cpu_emergency_exit();
+ }
+
+ /*