WARNING: line length of 84 exceeds 80 columns
#130: FILE: tools/testing/selftests/bpf/bpf_kfuncs.h:100:
+extern int bpf_sk_skb_set_redirect_cpu(struct __sk_buff *skb, int redir_cpu) __ksym;

CHECK: extern prototypes should be avoided in .h files
#130: FILE: tools/testing/selftests/bpf/bpf_kfuncs.h:100:
+extern int bpf_sk_skb_set_redirect_cpu(struct __sk_buff *skb, int redir_cpu) __ksym;

total: 0 errors, 1 warnings, 1 checks, 122 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 c8d111323223 ("selftest/bpf/benchs: Add cpu-affinity for sockmap bench") 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, 1 warnings, 1 checks, 122 lines checked