WARNING: line length of 88 exceeds 80 columns
#120: FILE: tools/lib/bpf/libbpf.c:1630:
+			pr_warn("elf: failed to open %s: %s\n", obj->path, errstr(err));

WARNING: line length of 97 exceeds 80 columns
#130: FILE: tools/lib/bpf/libbpf.c:2036:
+		pr_warn("failed to alloc map '%s' content buffer: %s\n", map->name, errstr(err));

WARNING: line length of 97 exceeds 80 columns
#178: FILE: tools/lib/bpf/libbpf.c:3310:
+			pr_warn("Error loading ELF section %s: %s.\n", BTF_ELF_SEC, errstr(err));

WARNING: line length of 88 exceeds 80 columns
#244: FILE: tools/lib/bpf/libbpf.c:5044:
+		__pr(level, "object '%s': failed (%s) to open BPF FS mount at '%s'%s\n",

WARNING: line length of 84 exceeds 80 columns
#453: FILE: tools/lib/bpf/libbpf.c:5727:
+			pr_warn("failed to iterate BTF objects: %s\n", errstr(err));

WARNING: line length of 90 exceeds 80 columns
#462: FILE: tools/lib/bpf/libbpf.c:5736:
+			pr_warn("failed to get BTF object #%d FD: %s\n", id, errstr(err));

WARNING: line length of 92 exceeds 80 columns
#471: FILE: tools/lib/bpf/libbpf.c:5748:
+			pr_warn("failed to get BTF object #%d info: %s\n", id, errstr(err));

WARNING: line length of 81 exceeds 80 columns
#491: FILE: tools/lib/bpf/libbpf.c:5991:
+			pr_warn("failed to parse target BTF: %s\n", errstr(err));

WARNING: line length of 91 exceeds 80 columns
#617: FILE: tools/lib/bpf/libbpf.c:7659:
+						prog->name, map->real_name, errstr(errno));

WARNING: line length of 87 exceeds 80 columns
#627: FILE: tools/lib/bpf/libbpf.c:7689:
+	pr_warn("prog '%s': BPF program load failed: %s\n", prog->name, errstr(errno));

WARNING: line length of 92 exceeds 80 columns
#636: FILE: tools/lib/bpf/libbpf.c:7982:
+			pr_warn("prog '%s': failed to load: %s\n", prog->name, errstr(err));

WARNING: line length of 97 exceeds 80 columns
#709: FILE: tools/lib/bpf/libbpf.c:8755:
+		pr_warn("prog '%s': failed to pin at '%s': %s\n", prog->name, path, errstr(err));

WARNING: line length of 95 exceeds 80 columns
#747: FILE: tools/lib/bpf/libbpf.c:10044:
+		pr_warn("Failed to get BTF %d of the program: %s\n", info.btf_id, errstr(err));

WARNING: line length of 86 exceeds 80 columns
#758: FILE: tools/lib/bpf/libbpf.c:10127:
+				prog->name, attach_prog_fd, attach_name, errstr(err));

WARNING: line length of 90 exceeds 80 columns
#921: FILE: tools/lib/bpf/libbpf.c:11476:
+		pr_warn("failed to open %s: %s\n", available_functions_file, errstr(err));

WARNING: line length of 85 exceeds 80 columns
#976: FILE: tools/lib/bpf/libbpf.c:11894:
+		pr_warn("legacy uprobe perf_event_open() failed: %s\n", errstr(err));

WARNING: line length of 85 exceeds 80 columns
#1282: FILE: tools/lib/bpf/libbpf.c:13584:
+			pr_warn("error while processing records: %s\n", errstr(err));

WARNING: line length of 84 exceeds 80 columns
#1301: FILE: tools/lib/bpf/libbpf.c:13780:
+		pr_warn("Failed to open cpu mask file %s: %s\n", fcpu, errstr(err));

WARNING: line length of 84 exceeds 80 columns
#1309: FILE: tools/lib/bpf/libbpf.c:13787:
+		pr_warn("Failed to read cpu mask from %s: %s\n", fcpu, errstr(err));

WARNING: line length of 97 exceeds 80 columns
#1327: FILE: tools/lib/bpf/libbpf.c:13887:
+		pr_warn("failed to populate skeleton maps for '%s': %s\n", s->name, errstr(err));

WARNING: line length of 98 exceeds 80 columns
#1334: FILE: tools/lib/bpf/libbpf.c:13893:
+		pr_warn("failed to populate skeleton progs for '%s': %s\n", s->name, errstr(err));

WARNING: line length of 82 exceeds 80 columns
#1343: FILE: tools/lib/bpf/libbpf.c:13923:
+		pr_warn("failed to populate subskeleton maps: %s\n", errstr(err));

WARNING: line length of 82 exceeds 80 columns
#1350: FILE: tools/lib/bpf/libbpf.c:13929:
+		pr_warn("failed to populate subskeleton maps: %s\n", errstr(err));

WARNING: line length of 88 exceeds 80 columns
#1359: FILE: tools/lib/bpf/libbpf.c:13976:
+		pr_warn("failed to load BPF skeleton '%s': %s\n", s->name, errstr(err));

total: 0 errors, 24 warnings, 0 checks, 1236 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 f5e879d3ce05 ("libbpf: stringify error codes in warning messages") 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, 24 warnings, 0 checks, 1236 lines checked