Different hashes have the same class key key because they get initialised with the same one. For this reason lockdep can create false warning when they are used recursively. Re-initialise the key for each hash after the invocation to hash_new() to avoid this problem. Signed-off-by: Antonio Quartulli &lt;ordex(a)autistici.org&gt; --- originator.c | 6 ++++++ translation-table.c | 10 ++++++++++ vis.c | 6 ++++++ 3 files changed, 22 insertions(+) diff --git a/originator.c b/originator.c index 8c32cf1..109081c 100644 --- a/originator.c +++ b/originator.c @@ -29,6 +29,9 @@ #include "soft-interface.h" #include "bridge_loop_avoidance.h" +/* hash class keys */ +static struct lock_class_key batadv_orig_hash_lock_class_key; + static void batadv_purge_orig(struct work_struct *work); static void batadv_start_purge_timer(struct batadv_priv *bat_priv) @@ -57,6 +60,9 @@ int batadv_originator_init(struct batadv_priv *bat_priv) if (!bat_priv->orig_hash) goto err; + batadv_hash_set_lock_class(bat_priv->orig_hash, + &batadv_orig_hash_lock_class_key); + batadv_start_purge_timer(bat_priv); return 0; diff --git a/translation-table.c b/translation-table.c index 4657d9e..1bcb705 100644 --- a/translation-table.c +++ b/translation-table.c @@ -29,6 +29,10 @@ #include <linux/crc16.h> +/* hash class keys */ +static struct lock_class_key batadv_tt_local_hash_lock_class_key; +static struct lock_class_key batadv_tt_global_hash_lock_class_key; + static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, struct batadv_orig_node *orig_node); static void batadv_tt_purge(struct work_struct *work); @@ -235,6 +239,9 @@ static int batadv_tt_local_init(struct batadv_priv *bat_priv) if (!bat_priv->tt.local_hash) return -ENOMEM; + batadv_hash_set_lock_class(bat_priv->tt.local_hash, + &batadv_tt_local_hash_lock_class_key); + return 0; } @@ -691,6 +698,9 @@ static int batadv_tt_global_init(struct batadv_priv *bat_priv) if (!bat_priv->tt.global_hash) return -ENOMEM; + batadv_hash_set_lock_class(bat_priv->tt.global_hash, + &batadv_tt_global_hash_lock_class_key); + return 0; } diff --git a/vis.c b/vis.c index 0f65a9d..60eb9b7 100644 --- a/vis.c +++ b/vis.c @@ -28,6 +28,9 @@ #define BATADV_MAX_VIS_PACKET_SIZE 1000 +/* hash class keys */ +static struct lock_class_key batadv_vis_hash_lock_class_key; + static void batadv_start_vis_timer(struct batadv_priv *bat_priv); /* free the info */ @@ -852,6 +855,9 @@ int batadv_vis_init(struct batadv_priv *bat_priv) goto err; } + batadv_hash_set_lock_class(bat_priv->vis.hash, + &batadv_vis_hash_lock_class_key); + bat_priv->vis.my_info = kmalloc(BATADV_MAX_VIS_PACKET_SIZE, GFP_ATOMIC); if (!bat_priv->vis.my_info) goto err; -- 1.8.0