[PATCH net-next] samples/bpf: fix warnings in xdp_monitor_user

[Stephen Hemminger <stephen@networkplumber.org>]

Make local functions static to fix

  HOSTCC  samples/bpf/xdp_monitor_user.o
samples/bpf/xdp_monitor_user.c:64:7: warning: no previous prototype for ‘gettime’ [-Wmissing-prototypes]
 __u64 gettime(void)
       ^~~~~~~
samples/bpf/xdp_monitor_user.c:209:6: warning: no previous prototype for ‘print_bpf_prog_info’ [-Wmissing-prototypes]
 void print_bpf_prog_info(void)
      ^~~~~~~~~~~~~~~~~~~
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 samples/bpf/xdp_monitor_user.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/samples/bpf/xdp_monitor_user.c b/samples/bpf/xdp_monitor_user.c
index b51b4f5e3257..c5ab8b776973 100644
--- a/samples/bpf/xdp_monitor_user.c
+++ b/samples/bpf/xdp_monitor_user.c
@@ -61,7 +61,7 @@ static void usage(char *argv[])
 }
 
 #define NANOSEC_PER_SEC 1000000000 /* 10^9 */
-__u64 gettime(void)
+static __u64 gettime(void)
 {
 	struct timespec t;
 	int res;
@@ -206,7 +206,7 @@ static void stats_poll(int interval, bool err_only)
 	}
 }
 
-void print_bpf_prog_info(void)
+static void print_bpf_prog_info(void)
 {
 	int i;
 
-- 
2.11.0