[TCP] tcp_probe: use GCC printf attribute
The function in tcp_probe is printf like, use GCC to check the args. Sighed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -80,7 +80,8 @@ static void printl(const char *fmt, ...)
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kfifo_put(tcpw.fifo, tbuf, len);
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wake_up(&tcpw.wait);
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}
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} __attribute__ ((format (printf, 1, 2)));
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/*
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* Hook inserted to be called before each receive packet.
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