WARNING: line length of 97 exceeds 80 columns
#79: FILE: tools/lib/bpf/libbpf.c:7463:
+static void try_get_fentry_func_addr(const char *func_name, struct bpf_prog_load_opts *load_attr)

WARNING: line length of 90 exceeds 80 columns
#81: FILE: tools/lib/bpf/libbpf.c:7465:
+	const char *available_functions_file = tracefs_available_filter_functions_addrs();

WARNING: line length of 92 exceeds 80 columns
#90: FILE: tools/lib/bpf/libbpf.c:7474:
+		pr_warn("failed to open %s: %s\n", available_functions_file, errstr(errno));

WARNING: line length of 84 exceeds 80 columns
#109: FILE: tools/lib/bpf/libbpf.c:7493:
+		/* find [func_name] optimized by compiler like [func_name].isra.0 */

WARNING: line length of 82 exceeds 80 columns
#112: FILE: tools/lib/bpf/libbpf.c:7496:
+					strlen(sym_name) - strlen(suffix)) == 0) {

CHECK: Alignment should match open parenthesis
#112: FILE: tools/lib/bpf/libbpf.c:7496:
+		if (suffix && strncmp(sym_name, func_name,
+					strlen(sym_name) - strlen(suffix)) == 0) {

CHECK: Alignment should match open parenthesis
#129: FILE: tools/lib/bpf/libbpf.c:7554:
+	if (load_attr.expected_attach_type == BPF_TRACE_FENTRY ||
+		load_attr.expected_attach_type == BPF_TRACE_FEXIT) {

total: 0 errors, 5 warnings, 2 checks, 93 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 4f1164ad701f ("libbpf: Try get fentry func addr from available_filter_functions_addr") 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, 5 warnings, 2 checks, 93 lines checked