tree cad273de648996d679f3cbfba678b84ff14f40b7
parent 50dc875f2e6e2e04aed3b3033eb0ac99192d6d02
author Eric Dumazet <edumazet@google.com> 1387133626 -0800
committer David S. Miller <davem@davemloft.net> 1387309858 -0500

udp: ipv4: do not use sk_dst_lock from softirq context

Using sk_dst_lock from softirq context is not supported right now.

Instead of adding BH protection everywhere,
udp_sk_rx_dst_set() can instead use xchg(), as suggested
by David.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Fixes: 975022310233 ("udp: ipv4: must add synchronization in udp_sk_rx_dst_set()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>