New files:
tools/testing/selftests/net/icmp_rfc4884.c

Modified files:
tools/testing/selftests/net/.gitignore
tools/testing/selftests/net/Makefile

format check ignoring tools/testing/selftests/net/icmp_rfc4884.c
git grep icmp_rfc4884 -- tools/testing/selftests/net/Makefile:: 0
git grep icmp_rfc4884 -- tools/testing/selftests/net/.gitignore:: 0