=== modified file 'include/linux/lockdep.h'
--- old/include/linux/lockdep.h	2017-05-04 04:27:46 +0000
+++ new/include/linux/lockdep.h	2017-05-04 04:39:00 +0000
@@ -373,7 +373,7 @@ extern struct pin_cookie lock_pin_lock(s
 extern void lock_repin_lock(struct lockdep_map *lock, struct pin_cookie);
 extern void lock_unpin_lock(struct lockdep_map *lock, struct pin_cookie);
 
-# define INIT_LOCKDEP				.lockdep_recursion = 0, .lockdep_reclaim_gfp = 0,
+# define INIT_LOCKDEP				.lockdep_recursion = 0, .lockdep_reclaim_gfp = 0, .nolockdep_call = 0,
 
 #define lockdep_depth(tsk)	(debug_locks ? (tsk)->lockdep_depth : 0)
 

=== modified file 'include/linux/sched.h'
--- old/include/linux/sched.h	2017-05-04 04:27:46 +0000
+++ new/include/linux/sched.h	2017-05-04 04:39:00 +0000
@@ -1789,6 +1789,9 @@ struct task_struct {
 # define MAX_LOCK_DEPTH 48UL
 	u64 curr_chain_key;
 	int lockdep_depth;
+# define NOLOCKDEP_SUPPORTED 1
+	unsigned int nolockdep_call:1;
+	unsigned int nolockdep_call_irq_saved:1;
 	unsigned int lockdep_recursion;
 	struct held_lock held_locks[MAX_LOCK_DEPTH];
 	gfp_t lockdep_reclaim_gfp;

=== modified file 'kernel/locking/lockdep.c'
--- old/kernel/locking/lockdep.c	2017-05-04 04:27:46 +0000
+++ new/kernel/locking/lockdep.c	2017-05-04 04:39:00 +0000
@@ -3745,9 +3745,11 @@ void lock_acquire(struct lockdep_map *lo
 	if (unlikely(current->lockdep_recursion))
 		return;
 
+	if (unlikely(current->nolockdep_call))
+		return;
+
 	raw_local_irq_save(flags);
 	check_flags(flags);
-
 	current->lockdep_recursion = 1;
 	trace_lock_acquire(lock, subclass, trylock, read, check, nest_lock, ip);
 	__lock_acquire(lock, subclass, trylock, read, check,
@@ -3765,6 +3767,9 @@ void lock_release(struct lockdep_map *lo
 	if (unlikely(current->lockdep_recursion))
 		return;
 
+	if (unlikely(current->nolockdep_call))
+		return;
+
 	raw_local_irq_save(flags);
 	check_flags(flags);
 	current->lockdep_recursion = 1;
@@ -4013,6 +4018,9 @@ void lock_contended(struct lockdep_map *
 	if (unlikely(current->lockdep_recursion))
 		return;
 
+	if (unlikely(current->nolockdep_call))
+		return;
+
 	raw_local_irq_save(flags);
 	check_flags(flags);
 	current->lockdep_recursion = 1;
@@ -4033,6 +4041,9 @@ void lock_acquired(struct lockdep_map *l
 	if (unlikely(current->lockdep_recursion))
 		return;
 
+	if (unlikely(current->nolockdep_call))
+		return;
+
 	raw_local_irq_save(flags);
 	check_flags(flags);
 	current->lockdep_recursion = 1;

=== modified file 'kernel/softirq.c'
--- old/kernel/softirq.c	2017-05-04 04:27:46 +0000
+++ new/kernel/softirq.c	2017-05-04 04:39:00 +0000
@@ -335,6 +335,17 @@ asmlinkage __visible void do_softirq(voi
  */
 void irq_enter(void)
 {
+#ifdef CONFIG_LOCKDEP
+	if (unlikely(current->nolockdep_call)) {
+		unsigned long flags;
+		local_irq_save(flags);
+		if (current->nolockdep_call) {
+			current->nolockdep_call_irq_saved = 1;
+			current->nolockdep_call = 0;
+		}
+		local_irq_restore(flags);
+	}
+#endif
 	rcu_irq_enter();
 	if (is_idle_task(current) && !in_interrupt()) {
 		/*
@@ -406,6 +417,17 @@ void irq_exit(void)
 
 	tick_irq_exit();
 	rcu_irq_exit();
+#ifdef CONFIG_LOCKDEP
+	if (unlikely(current->nolockdep_call_irq_saved)) {
+		unsigned long flags;
+		local_irq_save(flags);
+		if (current->nolockdep_call_irq_saved) {
+			current->nolockdep_call_irq_saved = 0;
+			current->nolockdep_call = 1;
+		}
+		local_irq_restore(flags);
+	}
+#endif
 	trace_hardirq_exit(); /* must be last! */
 }