From: Linus Lüssing <linus.luessing@web.de>
Date: Mon, 15 Apr 2013 13:43:29 +0000 (+0800)
Subject: batman-adv: Fix rcu_barrier() miss due to double call_rcu() in TT code
X-Git-Tag: v3.10-rc3~18^2~34^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72822225bd41320a98f5d7cde38317766e18983f;p=pandora-kernel.git

batman-adv: Fix rcu_barrier() miss due to double call_rcu() in TT code

rcu_barrier() only waits for the currently scheduled rcu functions
to finish - it won't wait for any function scheduled via another
call_rcu() within an rcu scheduled function.

Unfortunately our batadv_tt_orig_list_entry_free_ref() does just that,
via a batadv_orig_node_free_ref() call, leading to our rcu_barrier()
call potentially missing such a batadv_orig_node_free_ref().

This patch fixes this issue by calling the batadv_orig_node_free_rcu()
directly from the rcu callback, removing the unnecessary, additional
call_rcu() layer here.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Acked-by: Antonio Quartulli <ordex@autistici.org>
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