Thread (1 message) 1 message, 1 author, 2016-08-22
DORMANTno replies

[PATCH 03/20] batman-adv: Place kref_get for tt_orig_list_entry near use

From: Simon Wunderlich <hidden>
Date: 2016-08-22 13:56:03
Also in: batman
Subsystem: batman advanced, the rest · Maintainers: Marek Lindner, Simon Wunderlich, Antonio Quartulli, Sven Eckelmann, Linus Torvalds

From: Sven Eckelmann <redacted>

It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.

Signed-off-by: Sven Eckelmann <redacted>
Signed-off-by: Marek Lindner <redacted>
Signed-off-by: Simon Wunderlich <redacted>
---
 net/batman-adv/translation-table.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 2080407..5cc500f 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1567,9 +1567,9 @@ batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
 	orig_entry->orig_node = orig_node;
 	orig_entry->ttvn = ttvn;
 	kref_init(&orig_entry->refcount);
-	kref_get(&orig_entry->refcount);
 
 	spin_lock_bh(&tt_global->list_lock);
+	kref_get(&orig_entry->refcount);
 	hlist_add_head_rcu(&orig_entry->list,
 			   &tt_global->orig_list);
 	spin_unlock_bh(&tt_global->list_lock);
-- 
2.9.3
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help