diff options
| author | Sven Eckelmann <sven@narfation.org> | 2011-05-15 00:50:21 +0200 |
|---|---|---|
| committer | Sven Eckelmann <sven@narfation.org> | 2011-05-30 07:39:34 +0200 |
| commit | 728cbc6ac1eef89660875c70a602c1a0ba8df4ff (patch) | |
| tree | fcdf37937b1f01494400a0e8d57490360c64cdc3 | |
| parent | 704509b8d44886cebfbaff1a9813c35dfa986954 (diff) | |
| download | linux-3.10-728cbc6ac1eef89660875c70a602c1a0ba8df4ff.tar.gz linux-3.10-728cbc6ac1eef89660875c70a602c1a0ba8df4ff.tar.bz2 linux-3.10-728cbc6ac1eef89660875c70a602c1a0ba8df4ff.zip | |
batman-adv: Use rcu_dereference_protected by update-side
Usually rcu_dereference isn't necessary in situations were the
RCU-protected data structure cannot change, but sparse and lockdep still
need a similar functionality for analysis. rcu_dereference_protected
implements the reduced version which should be used to support the
dynamic and static analysis.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
| -rw-r--r-- | net/batman-adv/gateway_client.c | 2 | ||||
| -rw-r--r-- | net/batman-adv/hard-interface.c | 2 | ||||
| -rw-r--r-- | net/batman-adv/soft-interface.c | 3 |
3 files changed, 4 insertions, 3 deletions
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index a44dff3efb7..ab597c4f9dd 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -86,7 +86,7 @@ static void gw_select(struct bat_priv *bat_priv, struct gw_node *new_gw_node) if (new_gw_node && !atomic_inc_not_zero(&new_gw_node->refcount)) new_gw_node = NULL; - curr_gw_node = bat_priv->curr_gw; + curr_gw_node = rcu_dereference_protected(bat_priv->curr_gw, 1); rcu_assign_pointer(bat_priv->curr_gw, new_gw_node); if (curr_gw_node) diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index e0052cf389d..a3fbfb5c92f 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -138,7 +138,7 @@ static void primary_if_select(struct bat_priv *bat_priv, if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount)) new_hard_iface = NULL; - curr_hard_iface = bat_priv->primary_if; + curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1); rcu_assign_pointer(bat_priv->primary_if, new_hard_iface); if (curr_hard_iface) diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index cead606008a..b8d3f248efd 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -241,7 +241,8 @@ static void softif_neigh_vid_select(struct bat_priv *bat_priv, if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount)) new_neigh = NULL; - curr_neigh = softif_neigh_vid->softif_neigh; + curr_neigh = rcu_dereference_protected(softif_neigh_vid->softif_neigh, + 1); rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh); if ((curr_neigh) && (!new_neigh)) |