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

WARNING: line length of 118 exceeds 80 columns
#39: FILE: tools/testing/selftests/bpf/progs/bpf_misc.h:149:
+#define __stderr(msg)		__attribute__((btf_decl_tag("comment:test_expect_stderr=" XSTR(__COUNTER__) "=" msg)))

WARNING: line length of 125 exceeds 80 columns
#40: FILE: tools/testing/selftests/bpf/progs/bpf_misc.h:150:
+#define __stderr_unpriv(msg)	__attribute__((btf_decl_tag("comment:test_expect_stderr_unpriv=" XSTR(__COUNTER__) "=" msg)))

WARNING: line length of 118 exceeds 80 columns
#41: FILE: tools/testing/selftests/bpf/progs/bpf_misc.h:151:
+#define __stdout(msg)		__attribute__((btf_decl_tag("comment:test_expect_stdout=" XSTR(__COUNTER__) "=" msg)))

WARNING: line length of 125 exceeds 80 columns
#42: FILE: tools/testing/selftests/bpf/progs/bpf_misc.h:152:
+#define __stdout_unpriv(msg)	__attribute__((btf_decl_tag("comment:test_expect_stdout_unpriv=" XSTR(__COUNTER__) "=" msg)))

WARNING: line length of 85 exceeds 80 columns
#96: FILE: tools/testing/selftests/bpf/test_loader.c:615:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDERR_PFX))) {

ERROR: do not use assignment in if condition
#96: FILE: tools/testing/selftests/bpf/test_loader.c:615:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDERR_PFX))) {

WARNING: line length of 92 exceeds 80 columns
#101: FILE: tools/testing/selftests/bpf/test_loader.c:620:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDERR_PFX_UNPRIV))) {

ERROR: do not use assignment in if condition
#101: FILE: tools/testing/selftests/bpf/test_loader.c:620:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDERR_PFX_UNPRIV))) {

WARNING: line length of 85 exceeds 80 columns
#106: FILE: tools/testing/selftests/bpf/test_loader.c:625:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDOUT_PFX))) {

ERROR: do not use assignment in if condition
#106: FILE: tools/testing/selftests/bpf/test_loader.c:625:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDOUT_PFX))) {

WARNING: line length of 92 exceeds 80 columns
#111: FILE: tools/testing/selftests/bpf/test_loader.c:630:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDOUT_PFX_UNPRIV))) {

ERROR: do not use assignment in if condition
#111: FILE: tools/testing/selftests/bpf/test_loader.c:630:
+		} else if ((msg = skip_dynamic_pfx(s, TEST_TAG_EXPECT_STDOUT_PFX_UNPRIV))) {

WARNING: line length of 81 exceeds 80 columns
#145: FILE: tools/testing/selftests/bpf/test_loader.c:764:
+	fprintf(stdout, "STDOUT:\n=============\n%s=============\n", bpf_stdout);

WARNING: line length of 99 exceeds 80 columns
#180: FILE: tools/testing/selftests/bpf/test_loader.c:1181:
+				PRINT_FAIL("Unexpected retval from get_stream(): %d, errno = %d\n",

WARNING: line length of 86 exceeds 80 columns
#185: FILE: tools/testing/selftests/bpf/test_loader.c:1186:
+			validate_msgs(tester->log_buf, &subspec->stderr, emit_stderr);

WARNING: line length of 99 exceeds 80 columns
#192: FILE: tools/testing/selftests/bpf/test_loader.c:1193:
+				PRINT_FAIL("Unexpected retval from get_stream(): %d, errno = %d\n",

WARNING: line length of 86 exceeds 80 columns
#197: FILE: tools/testing/selftests/bpf/test_loader.c:1198:
+			validate_msgs(tester->log_buf, &subspec->stdout, emit_stdout);

total: 4 errors, 13 warnings, 0 checks, 166 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 8358f3f9a0b3 ("selftests: bpf: introduce __stderr and __stdout") 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.