netdev - [PATCH] net: core: devlink.c: Use built-in RCU list checking

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Message-Id: <20200221165141.24630-1-madhuparnabhowmik10@gmail.com>
Date:   Fri, 21 Feb 2020 22:21:41 +0530
From:   madhuparnabhowmik10@...il.com
To:     jiri@...lanox.com, davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        joel@...lfernandes.org, frextrite@...il.com,
        linux-kernel-mentees@...ts.linuxfoundation.org, paulmck@...nel.org,
        Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
Subject: [PATCH] net: core: devlink.c: Use built-in RCU list checking

From: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>

list_for_each_entry_rcu() has built-in RCU and lock checking.

Pass cond argument to list_for_each_entry_rcu() to silence
false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled
by default.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
---
 net/core/devlink.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 4c63c9a4c09e..3e8c94155d93 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2107,7 +2107,8 @@ devlink_dpipe_table_find(struct list_head *dpipe_tables,
 {
 	struct devlink_dpipe_table *table;
 
-	list_for_each_entry_rcu(table, dpipe_tables, list) {
+	list_for_each_entry_rcu(table, dpipe_tables, list,
+				lockdep_is_held(&devlink->lock)) {
 		if (!strcmp(table->name, table_name))
 			return table;
 	}
-- 
2.17.1