From 5274cd68d744b4bc59b32d87cbde70803130eb3f Mon Sep 17 00:00:00 2001
From: Sven Eckelmann <sven@narfation.org>
Date: Sun, 21 Jun 2015 14:45:15 +0200
Subject: [PATCH] batman-adv: Add lockdep_asserts for documented external locks
Some functions already have documentation about locks they require inside
their kerneldoc header. These can be directly tested during runtime using
the lockdep asserts.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
---
net/batman-adv/fragmentation.c | 3 +++
net/batman-adv/multicast.c | 6 ++++++
net/batman-adv/translation-table.c | 2 ++
3 files changed, 11 insertions(+)
diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index ec5f7bcad66e..700c96c82a15 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -25,6 +25,7 @@
#include <linux/if_ether.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
+#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/pkt_sched.h>
#include <linux/skbuff.h>
@@ -112,6 +113,8 @@ static int batadv_frag_size_limit(void)
static bool batadv_frag_init_chain(struct batadv_frag_table_entry *chain,
u16 seqno)
{
+ lockdep_assert_held(&chain->lock);
+
if (chain->seqno == seqno)
return false;
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index 410f34cf85c2..eb76386f8d4b 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -609,6 +609,8 @@ static void batadv_mcast_want_unsnoop_update(struct batadv_priv *bat_priv,
struct hlist_node *node = &orig->mcast_want_all_unsnoopables_node;
struct hlist_head *head = &bat_priv->mcast.want_all_unsnoopables_list;
+ lockdep_assert_held(&orig->mcast_handler_lock);
+
/* switched from flag unset to set */
if (mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&
!(orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)) {
@@ -652,6 +654,8 @@ static void batadv_mcast_want_ipv4_update(struct batadv_priv *bat_priv,
struct hlist_node *node = &orig->mcast_want_all_ipv4_node;
struct hlist_head *head = &bat_priv->mcast.want_all_ipv4_list;
+ lockdep_assert_held(&orig->mcast_handler_lock);
+
/* switched from flag unset to set */
if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV4 &&
!(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4)) {
@@ -695,6 +699,8 @@ static void batadv_mcast_want_ipv6_update(struct batadv_priv *bat_priv,
struct hlist_node *node = &orig->mcast_want_all_ipv6_node;
struct hlist_head *head = &bat_priv->mcast.want_all_ipv6_list;
+ lockdep_assert_held(&orig->mcast_handler_lock);
+
/* switched from flag unset to set */
if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV6 &&
!(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6)) {
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 79cee7b771dc..4228b10c47ea 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -3271,6 +3271,8 @@ static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv)
*/
static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
{
+ lockdep_assert_held(&bat_priv->tt.commit_lock);
+
/* Update multicast addresses in local translation table */
batadv_mcast_mla_update(bat_priv);