genetlink: pass only network namespace to genl_has_listeners()
There's no point to force the caller to know about the internal genl_sock to use inside struct net, just have them pass the network namespace. This doesn't really change code generation since it's an inline, but makes the caller less magic - there's never any reason to pass another socket. Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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