From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sun, 15 Aug 2021 23:28:17 +0200
Subject: [PATCH 27/72] locking/lockdep: Reduce header dependencies in
 <linux/debug_locks.h>

The inclusion of printk.h leads to a circular dependency if spinlock_t is
based on rtmutexes on RT enabled kernels.

Include only atomic.h (xchg()) and cache.h (__read_mostly) which is all
what debug_locks.h requires.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210815211303.484161136@linutronix.de
---
 include/linux/debug_locks.h |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/include/linux/debug_locks.h
+++ b/include/linux/debug_locks.h
@@ -3,8 +3,7 @@
 #define __LINUX_DEBUG_LOCKING_H
 
 #include <linux/atomic.h>
-#include <linux/bug.h>
-#include <linux/printk.h>
+#include <linux/cache.h>
 
 struct task_struct;