[PATCH] lockdep: Do not record irq state in debug_check_no_locks_freed()

From: Steven Rostedt
Date: Wed Apr 04 2018 - 12:19:10 EST

From: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>

While debugging where things were going wrong with mapping
enabling/disabling interrupts with the lockdep state and actual real
enabling and disabling interrupts, I had to silent the irq
disabling/enabling in debug_check_no_locks_freed() because it was
always showing up as it was called before the splat was.

Use raw_local_irq_save/restore() for debug_check_no_locks_freed() as it
hides useful information about where interrupts were used incorrectly

Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 89b5f83f1969..8c145dc1315b 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4407,7 +4407,7 @@ void debug_check_no_locks_freed(const void *mem_from, unsigned long mem_len)
if (unlikely(!debug_locks))

- local_irq_save(flags);
+ raw_local_irq_save(flags);
for (i = 0; i < curr->lockdep_depth; i++) {
hlock = curr->held_locks + i;

@@ -4418,7 +4418,7 @@ void debug_check_no_locks_freed(const void *mem_from, unsigned long mem_len)
print_freed_lock_bug(curr, mem_from, mem_from + mem_len, hlock);
- local_irq_restore(flags);
+ raw_local_irq_restore(flags);