net: use trylock in icmp_sk

The locking path can be recursive (same as for sk->sk_lock.slock) and
therefore we need a trylock version for the locallock, too.

Cc: stable-rt@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed