diff options
Diffstat (limited to 'debian/patches-rt/0120-lockdep-Mark-emergency-section-in-lockdep-splats.patch')
| -rw-r--r-- | debian/patches-rt/0120-lockdep-Mark-emergency-section-in-lockdep-splats.patch | 45 |
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(); + } + + /* |