Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Frederic Weisbecker <frederic@kernel.org>
To:     "Paul E . McKenney" <paulmck@kernel.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Frederic Weisbecker <frederic@kernel.org>,
        rcu <rcu@vger.kernel.org>, Uladzislau Rezki <urezki@gmail.com>,
        Neeraj Upadhyay <quic_neeraju@quicinc.com>,
        Joel Fernandes <joel@joelfernandes.org>,
        Giovanni Gherdovich <ggherdovich@suse.cz>
Subject: [PATCH 8/9] rcu: Make segcblist flags test strict
Date:   Wed, 31 May 2023 12:17:35 +0200
Message-Id: <20230531101736.12981-9-frederic@kernel.org>
In-Reply-To: <20230531101736.12981-1-frederic@kernel.org>
References: <20230531101736.12981-1-frederic@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

While testing several flags at once, make sure that all of them verify
the test. This will be necessary to check if an rdp is (de-)offloading.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
---
 kernel/rcu/rcu_segcblist.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/rcu_segcblist.h b/kernel/rcu/rcu_segcblist.h
index 620ca48e782b..36245efdf800 100644
--- a/kernel/rcu/rcu_segcblist.h
+++ b/kernel/rcu/rcu_segcblist.h
@@ -70,7 +70,7 @@ static inline void rcu_segcblist_clear_flags(struct rcu_segcblist *rsclp,
 static inline bool rcu_segcblist_test_flags(struct rcu_segcblist *rsclp,
 					    int flags)
 {
-	return READ_ONCE(rsclp->flags) & flags;
+	return (READ_ONCE(rsclp->flags) & flags) == flags;
 }
 
 /*
-- 
2.40.1