linux-kernel - [PATCH tip/core/rcu 3/7] smsc: Replace spin_is

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Date:   Sun, 11 Nov 2018 12:04:39 -0800
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        Lance Roy <ldr709@...il.com>,
        Steve Glendinning <steve.glendinning@...well.net>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        "Paul E . McKenney" <paulmck@...ux.ibm.com>
Subject: [PATCH tip/core/rcu 3/7] smsc: Replace spin_is_locked() with lockdep

From: Lance Roy <ldr709@...il.com>

lockdep_assert_held() is better suited to checking locking requirements,
since it only checks if the current thread holds the lock regardless of
whether someone else does. This is also a step towards possibly removing
spin_is_locked().

Signed-off-by: Lance Roy <ldr709@...il.com>
Cc: Steve Glendinning <steve.glendinning@...well.net>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: <netdev@...r.kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
---
 drivers/net/ethernet/smsc/smsc911x.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/smsc/smsc911x.h b/drivers/net/ethernet/smsc/smsc911x.h
index 8d75508acd2b..51b2fc1a395f 100644
--- a/drivers/net/ethernet/smsc/smsc911x.h
+++ b/drivers/net/ethernet/smsc/smsc911x.h
@@ -67,7 +67,7 @@
 
 #ifdef CONFIG_DEBUG_SPINLOCK
 #define SMSC_ASSERT_MAC_LOCK(pdata) \
-		WARN_ON_SMP(!spin_is_locked(&pdata->mac_lock))
+		lockdep_assert_held(&pdata->mac_lock)
 #else
 #define SMSC_ASSERT_MAC_LOCK(pdata) do {} while (0)
 #endif				/* CONFIG_DEBUG_SPINLOCK */
-- 
2.17.1