WARNING: static char array declaration should probably be static const char
#26: FILE: tools/testing/selftests/bpf/prog_tests/bpf_iter.c:37:
+static char test_data[] = "test_data";

WARNING: line length of 94 exceeds 80 columns
#102: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:92:
+	ret = bpf_copy_from_user_task_str((char *)task_str1, sizeof(task_str1), ptr, task, 0);

WARNING: line length of 81 exceeds 80 columns
#108: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:98:
+	/* Read an invalid pointer and ensure we get error with pad zeros flag */

WARNING: line length of 108 exceeds 80 columns
#110: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:100:
+	ret = bpf_copy_from_user_task_str((char *)task_str1, sizeof(task_str1), ptr, task, BPF_F_PAD_ZEROS);

WARNING: line length of 84 exceeds 80 columns
#119: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:109:
+	ret = bpf_copy_from_user_task_str((char *)task_str2, 10, user_ptr, task, 0);

WARNING: line length of 83 exceeds 80 columns
#126: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:116:
+	ret = bpf_copy_from_user_task_str((char *)task_str3, 9, user_ptr, task, 0);

WARNING: line length of 84 exceeds 80 columns
#133: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:123:
+	ret = bpf_copy_from_user_task_str((char *)task_str4, 20, user_ptr, task, 0);

WARNING: line length of 117 exceeds 80 columns
#134: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:124:
+	if (bpf_strncmp(task_str4, 10, "test_data\0") != 0 || ret != 10 || task_str4[sizeof(task_str4) - 1] != 'a') {

WARNING: line length of 98 exceeds 80 columns
#140: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:130:
+	ret = bpf_copy_from_user_task_str((char *)task_str4, 20, user_ptr, task, BPF_F_PAD_ZEROS);

WARNING: line length of 118 exceeds 80 columns
#141: FILE: tools/testing/selftests/bpf/progs/bpf_iter_tasks.c:131:
+	if (bpf_strncmp(task_str4, 10, "test_data\0") != 0 || ret != 10 || task_str4[sizeof(task_str4) - 1] != '\0') {

WARNING: line length of 103 exceeds 80 columns
#169: FILE: tools/testing/selftests/bpf/progs/read_vsyscall.c:19:
+int bpf_copy_from_user_task_str(void *dst, u32, const void *, struct task_struct *, u64) __weak __ksym;

WARNING: line length of 117 exceeds 80 columns
#177: FILE: tools/testing/selftests/bpf/progs/read_vsyscall.c:51:
+	read_ret[9] = bpf_copy_from_user_task_str((char *)buf, sizeof(buf), user_ptr, bpf_get_current_task_btf(), 0);

total: 0 errors, 12 warnings, 0 checks, 138 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 ee9f730508f5 ("selftests/bpf: Add tests for bpf_copy_from_user_task_str") 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, 12 warnings, 0 checks, 138 lines checked