[tip:locking/core] smp/core: Use lockdep to assert IRQs are disabled/enabled

[tip-bot for Frederic Weisbecker]

Commit-ID:  83efcbd028ad3aec36b5a3882cfa32490c135df7
Gitweb:     https://git.kernel.org/tip/83efcbd028ad3aec36b5a3882cfa32490c135df7
Author:     Frederic Weisbecker <frederic@xxxxxxxxxx>
AuthorDate: Mon, 6 Nov 2017 16:01:22 +0100
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 8 Nov 2017 11:13:50 +0100

smp/core: Use lockdep to assert IRQs are disabled/enabled

Use lockdep to check that IRQs are enabled or disabled as expected. This
way the sanity check only shows overhead when concurrency correctness
debug code is enabled.

Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: David S . Miller <davem@xxxxxxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1509980490-4285-7-git-send-email-frederic@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/smp.c b/kernel/smp.c
index c94dd85..084c8b3 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -213,7 +213,7 @@ static void flush_smp_call_function_queue(bool warn_cpu_offline)
 	call_single_data_t *csd, *csd_next;
 	static bool warned;
 
-	WARN_ON(!irqs_disabled());
+	lockdep_assert_irqs_disabled();
 
 	head = this_cpu_ptr(&call_single_queue);
 	entry = llist_del_all(head);