WARNING: line length of 93 exceeds 80 columns
#30: FILE: tools/testing/selftests/bpf/bpf_experimental.h:128:
+extern bool bpf_list_is_first(struct bpf_list_head *head, struct bpf_list_node *node) __ksym;

CHECK: extern prototypes should be avoided in .h files
#30: FILE: tools/testing/selftests/bpf/bpf_experimental.h:128:
+extern bool bpf_list_is_first(struct bpf_list_head *head, struct bpf_list_node *node) __ksym;

WARNING: line length of 92 exceeds 80 columns
#35: FILE: tools/testing/selftests/bpf/bpf_experimental.h:133:
+extern bool bpf_list_is_last(struct bpf_list_head *head, struct bpf_list_node *node) __ksym;

CHECK: extern prototypes should be avoided in .h files
#35: FILE: tools/testing/selftests/bpf/bpf_experimental.h:133:
+extern bool bpf_list_is_last(struct bpf_list_head *head, struct bpf_list_node *node) __ksym;

CHECK: extern prototypes should be avoided in .h files
#40: FILE: tools/testing/selftests/bpf/bpf_experimental.h:138:
+extern bool bpf_list_empty(struct bpf_list_head *head) __ksym;

WARNING: line length of 85 exceeds 80 columns
#62: FILE: tools/testing/selftests/bpf/progs/refcounted_kptr.c:375:
+__description("list_add_del_and_check: test bpf_list_add/del/is_first/is_last/empty")

total: 0 errors, 3 warnings, 3 checks, 75 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 93f155ae1caa ("selftests/bpf: Add test cases for bpf_list_is_first/is_last/empty") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 3 checks, 75 lines checked