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tunnels: missing rcu_assign_pointer()

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xfrm4_tunnel_register() & xfrm6_tunnel_register() should
use rcu_assign_pointer() to make sure previous writes
(to handler->next) are committed to memory before chain
insertion.

deregister functions dont need a particular barrier.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2010-09-09 05:33:43 +00:00
committed by David S. Miller
parent f39234d606
commit 49d61e2390
2 changed files with 2 additions and 2 deletions
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2
net/ipv4/tunnel4.c
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@@ -39,7 +39,7 @@ int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family)
}
handler->next = *pprev;
*pprev = handler;
rcu_assign_pointer(*pprev, handler);
ret = 0;