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

tip-bot for Frederic Weisbecker
2017-11-08T10:58:44Z

Commit-ID: 83efcbd028ad3aec36b5a3882cfa32490c135df7
Gitweb: https://git.kernel.org/tip/83efcbd028ad3aec36b5a3882cfa32490c135df7
Author: Frederic Weisbecker <frederic@kernel.org>
AuthorDate: Mon, 6 Nov 2017 16:01:22 +0100
Committer: Ingo Molnar <mingo@kernel.org>
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@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David S . Miller <davem@davemloft.net>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1509980490-4285-7-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
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);