WARNING: Missing a blank line after declarations
#98: FILE: tools/testing/selftests/bpf/prog_tests/file_reader.c:70:
+	char data[256];
+	LIBBPF_OPTS(bpf_test_run_opts, opts, .data_in = &data, .repeat = 1,

WARNING: line length of 97 exceeds 80 columns
#110: FILE: tools/testing/selftests/bpf/prog_tests/file_reader.c:82:
+		bpf_program__set_autoload(prog, strcmp(bpf_program__name(prog), prog_name) == 0);

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#186: FILE: tools/testing/selftests/bpf/progs/file_reader.c:34:
+volatile const __u32 user_buf_sz;

WARNING: line length of 90 exceeds 80 columns
#243: FILE: tools/testing/selftests/bpf/progs/file_reader.c:91:
+	bpf_task_work_schedule_signal(task, &work->tw, &arrmap, task_work_callback, NULL);

WARNING: line length of 91 exceeds 80 columns
#247: FILE: tools/testing/selftests/bpf/progs/file_reader.c:95:
+/* Called in a sleepable context, read 256K bytes, cross check with user space read data */

WARNING: line length of 87 exceeds 80 columns
#261: FILE: tools/testing/selftests/bpf/progs/file_reader.c:109:
+static int verify_dynptr_read(struct bpf_dynptr *ptr, u32 off, char *user_buf, u32 len)

WARNING: line length of 91 exceeds 80 columns
#273: FILE: tools/testing/selftests/bpf/progs/file_reader.c:121:
+	/* Verify file contents read from BPF is the same as the one read from userspace */

WARNING: line length of 97 exceeds 80 columns
#306: FILE: tools/testing/selftests/bpf/progs/file_reader.c:154:
+	local_err = local_err ?: verify_dynptr_read(&dynptr, off, ubuf + off, user_buf_sz - off);

WARNING: line length of 97 exceeds 80 columns
#308: FILE: tools/testing/selftests/bpf/progs/file_reader.c:156:
+	local_err = local_err ?: verify_dynptr_read(&dynptr, off, ubuf + off, user_buf_sz - off);

WARNING: line length of 83 exceeds 80 columns
#311: FILE: tools/testing/selftests/bpf/progs/file_reader.c:159:
+	local_err = local_err ?: verify_dynptr_read(&dynptr, off, ubuf + off, 100);

WARNING: line length of 84 exceeds 80 columns
#317: FILE: tools/testing/selftests/bpf/progs/file_reader.c:165:
+	local_err = local_err ?: verify_dynptr_read(&dynptr, 0, ubuf + off, 2) == 0;

WARNING: line length of 84 exceeds 80 columns
#319: FILE: tools/testing/selftests/bpf/progs/file_reader.c:167:
+	local_err = local_err ?: verify_dynptr_read(&dynptr, 1, ubuf + off, 1) == 0;

total: 0 errors, 12 warnings, 0 checks, 348 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 a9aa70463ddc ("selftests/bpf: add file dynptr tests") 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, 12 warnings, 0 checks, 348 lines checked