lockdep: Add print_irqtrace_events() to __warn

Running a test on a x86_32 kernel I triggered a bug that an interrupt disable/enable isn't being catched by lockdep. At least knowing where the last one was found would be helpful, but the warnings that are produced do not show this information. Even without debugging lockdep, having the WARN() display the last place hard and soft irqs were enabled or disabled is valuable. Signed-off-by: Steven Rostedt (VMware) <[email protected]>
ambv · Apr 6, 2018 · 4c28107 · 4c28107
1 parent 1e6338c
commit 4c28107
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/kernel/panic.c b/kernel/panic.c
@@ -554,6 +554,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
 	else
 		dump_stack();
 
+	print_irqtrace_events(current);
+
 	print_oops_end_marker();
 
 	/* Just a warning, don't kill lockdep. */