==========
checkpatch - FAILED

WARNING: line length of 82 exceeds 80 columns
#32: FILE: tools/lib/bpf/bpf.c:1404:
+	const size_t attr_sz = offsetofend(union bpf_attr, prog_assoc_struct_ops);

ERROR: space prohibited before that ':' (ctx:WxV)
#58: FILE: tools/lib/bpf/bpf.h:739:
+	size_t :0;
 	       ^

CHECK: Please use a blank line after function/struct/union/enum declarations
#60: FILE: tools/lib/bpf/bpf.h:741:
+};
+#define bpf_prog_assoc_struct_ops_opts__last_field flags

WARNING: line length of 86 exceeds 80 columns
#74: FILE: tools/lib/bpf/bpf.h:755:
+					 struct bpf_prog_assoc_struct_ops_opts *opts);

WARNING: line length of 87 exceeds 80 columns
#100: FILE: tools/lib/bpf/libbpf.c:13907:
+		pr_warn("prog '%s': can't associate struct_ops program\n", prog->name);

WARNING: line length of 103 exceeds 80 columns
#105: FILE: tools/lib/bpf/libbpf.c:13912:
+		pr_warn("map '%s': can't associate BPF map without FD (was it created?)\n", map->name);

WARNING: line length of 85 exceeds 80 columns
#110: FILE: tools/lib/bpf/libbpf.c:13917:
+		pr_warn("map '%s': can't associate non-struct_ops map\n", map->name);

total: 1 errors, 5 warnings, 1 checks, 113 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 e426d04dacaf ("libbpf: Add support for associating BPF program with struct_ops") 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.