From: Paul E. McKenney <paulmck@kernel.org>
Date: Sat, 26 Oct 2024 02:56:20 +0000 (-0700)
Subject: rcu: Add lockdep_assert_irqs_disabled() to rcu_exp_need_qs()
X-Git-Tag: v6.14-rc1~178^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1bb03ad383a7311f609ecfd13c3aaab248c0627f;p=thirdparty%2Fkernel%2Flinux.git

rcu: Add lockdep_assert_irqs_disabled() to rcu_exp_need_qs()

Callers to rcu_exp_need_qs() are supposed to disable interrupts, so this
commit enlists lockdep's aid in checking this.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---

diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index ce5b09921d04e..77efed89c79e3 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -722,6 +722,7 @@ static void rcu_exp_sel_wait_wake(unsigned long s)
 /* Request an expedited quiescent state. */
 static void rcu_exp_need_qs(void)
 {
+	lockdep_assert_irqs_disabled();
 	ASSERT_EXCLUSIVE_WRITER_SCOPED(*this_cpu_ptr(&rcu_data.cpu_no_qs.b.exp));
 	__this_cpu_write(rcu_data.cpu_no_qs.b.exp, true);
 	/* Store .exp before .rcu_urgent_qs. */