CHECK: Lines should not end with a '('
#24: FILE: tools/testing/selftests/bpf/prog_tests/netns_cookie.c:55:
+	skel->links.get_netns_cookie_tracing = bpf_program__attach(

WARNING: line length of 88 exceeds 80 columns
#26: FILE: tools/testing/selftests/bpf/prog_tests/netns_cookie.c:57:
+	if (!ASSERT_OK_PTR(skel->links.get_netns_cookie_tracing, "prog_attach_tracing"))

WARNING: line length of 108 exceeds 80 columns
#36: FILE: tools/testing/selftests/bpf/prog_tests/netns_cookie.c:94:
+	ASSERT_EQ(skel->bss->tracing_init_netns_cookie, cookie_expected_value, "cookie_value_init_tracing");

WARNING: line length of 98 exceeds 80 columns
#37: FILE: tools/testing/selftests/bpf/prog_tests/netns_cookie.c:95:
+	ASSERT_EQ(skel->bss->tracing_netns_cookie, cookie_expected_value, "cookie_value_tracing");

CHECK: Alignment should match open parenthesis
#67: FILE: tools/testing/selftests/bpf/progs/netns_cookie_prog.c:107:
+int BPF_PROG(get_netns_cookie_tracing, struct socket *sock,
+	struct sockaddr *uaddr, int addr_len, int flags)

total: 0 errors, 3 warnings, 2 checks, 48 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 063e86bb14cf ("selftests/bpf: add tracing netns cookie tests") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 3 warnings, 2 checks, 48 lines checked