net: sctp: attribute printl with __printf for gcc fmt checks

Let GCC check for format string errors in sctp's probe printl
function. This patch fixes the warning when compiled with W=1:

net/sctp/probe.c:73:2: warning: function might be possible candidate
for 'gnu_printf' format attribute [-Wmissing-format-attribute]

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sctp/probe.c b/net/sctp/probe.c
index ad0dba8..e62c225 100644 (file)
--- a/net/sctp/probe.c
+++ b/net/sctp/probe.c
@@ -63,7 +63,7 @@ static struct {
        struct timespec   tstart;
 } sctpw;
 
-static void printl(const char *fmt, ...)
+static __printf(1, 2) void printl(const char *fmt, ...)
 {
        va_list args;
        int len;