selftests/bpf: Fix an unused-but-set-variable compiler warning

When using clang to build selftests with LLVM=1 in make commandline,
I hit the following compiler warning:
  xdpxceiver.c:747:6: warning: variable 'total' set but not used [-Wunused-but-set-variable]
          u32 total = 0;
              ^

This patch fixed the issue by removing that declaration and its
assocatied unused operation.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211112204833.3579457-1-yhs@fb.com

diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
index 6c7cf8a..fe7f423 100644 (file)
--- a/tools/testing/selftests/bpf/xdpxceiver.c
+++ b/tools/testing/selftests/bpf/xdpxceiver.c
@@ -744,7 +744,6 @@ static void receive_pkts(struct pkt_stream *pkt_stream, struct xsk_socket_info *
        struct pkt *pkt = pkt_stream_get_next_rx_pkt(pkt_stream);
        struct xsk_umem_info *umem = xsk->umem;
        u32 idx_rx = 0, idx_fq = 0, rcvd, i;
-       u32 total = 0;
        int ret;
 
        while (pkt) {
@@ -799,7 +798,6 @@ static void receive_pkts(struct pkt_stream *pkt_stream, struct xsk_socket_info *
 
                pthread_mutex_lock(&pacing_mutex);
                pkts_in_flight -= rcvd;
-               total += rcvd;
                if (pkts_in_flight < umem->num_frames)
                        pthread_cond_signal(&pacing_cond);
                pthread_mutex_unlock(&pacing_mutex);