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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) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2018-04-03 10:31:47 -04:00
parent 1e6338cfb5
commit 4c281074d2
1 changed files with 2 additions and 0 deletions
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2
kernel/panic.c
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@ -554,6 +554,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
else else
dump_stack(); dump_stack();
print_irqtrace_events(current);
print_oops_end_marker(); print_oops_end_marker();
/* Just a warning, don't kill lockdep. */ /* Just a warning, don't kill lockdep. */