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batman-adv: use rcu_replace_pointer() where appropriate

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In commit a63fc6b75c ("rcu: Upgrade rcu_swap_protected() to
rcu_replace_pointer()") a new helper macro named rcu_replace_pointer() was
introduced to simplify code requiring to switch an rcu pointer to a new
value while extracting the old one.

Use rcu_replace_pointer() where appropriate to make code slimer.

Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Antonio Quartulli
2020-05-20 10:41:40 +02:00
committed by Simon Wunderlich
parent 2092c910e2
commit cf78bb0bbc
3 changed files with 6 additions and 6 deletions
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4
net/batman-adv/routing.c
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@@ -71,13 +71,13 @@ static void _batadv_update_route(struct batadv_priv *bat_priv,
* the code needs to ensure the curr_router variable contains a pointer
* to the replaced best neighbor.
*/
curr_router = rcu_dereference_protected(orig_ifinfo->router, true);
/* increase refcount of new best neighbor */
if (neigh_node)
kref_get(&neigh_node->refcount);
rcu_assign_pointer(orig_ifinfo->router, neigh_node);
curr_router = rcu_replace_pointer(orig_ifinfo->router, neigh_node,
true);
spin_unlock_bh(&orig_node->neigh_list_lock);
batadv_orig_ifinfo_put(orig_ifinfo);