[SRU REGRESSION Eoan 1/1] selftests: Fix bpf reuseport test

[Stefan Bader]

The IF_ERR macro is not yet defined, replace it with CHECK.
Alternatively we would have to revert the following patch:

  commit 1740b79aed7b5a121bb07ce30e4473225545b9d2
  Author: Lorenz Bauer <lmb at cloudflare.com>
  Date:   Fri Jan 24 11:27:54 2020 +0000

    selftests: bpf: Reset global state between reuseport test runs

BugLink: https://bugs.launchpad.net/bugs/1871613

Signed-off-by: Stefan Bader <stefan.bader at canonical.com>
---
 tools/testing/selftests/bpf/test_select_reuseport.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_select_reuseport.c b/tools/testing/selftests/bpf/test_select_reuseport.c
index 079d0f5a2909..567912df9c74 100644
--- a/tools/testing/selftests/bpf/test_select_reuseport.c
+++ b/tools/testing/selftests/bpf/test_select_reuseport.c
@@ -668,12 +668,12 @@ static void cleanup_per_test(void)
 
 	for (i = 0; i < NR_RESULTS; i++) {
 		err = bpf_map_update_elem(result_map, &i, &zero, BPF_ANY);
-		RET_IF(err, "reset elem in result_map",
+		CHECK(err == -1, "reset elem in result_map",
 		       "i:%u err:%d errno:%d\n", i, err, errno);
 	}
 
 	err = bpf_map_update_elem(linum_map, &zero, &zero, BPF_ANY);
-	RET_IF(err, "reset line number in linum_map", "err:%d errno:%d\n",
+	CHECK(err == -1, "reset line number in linum_map", "err:%d errno:%d\n",
 	       err, errno);
 
 	for (i = 0; i < REUSEPORT_ARRAY_SIZE; i++)
-- 
2.17.1