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| author | Sven Eckelmann <sven@narfation.org> | 2011-05-15 02:50:21 +0400 |
|---|---|---|
| committer | Sven Eckelmann <sven@narfation.org> | 2011-05-30 09:39:34 +0400 |
| commit | 728cbc6ac1eef89660875c70a602c1a0ba8df4ff (patch) | |
| tree | fcdf37937b1f01494400a0e8d57490360c64cdc3 /net/batman-adv/soft-interface.c | |
| parent | 704509b8d44886cebfbaff1a9813c35dfa986954 (diff) | |
| download | linux-728cbc6ac1eef89660875c70a602c1a0ba8df4ff.tar.xz | |
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>
Diffstat (limited to 'net/batman-adv/soft-interface.c')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index cead606008a1..b8d3f248efdc 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)) |