WARNING: line length of 100 exceeds 80 columns
#44: FILE: kernel/bpf/stackmap.c:263:
+	max_depth = stack_map_calculate_max_depth(map->value_size, stack_map_data_size(map), flags);

WARNING: line length of 91 exceeds 80 columns
#49: FILE: kernel/bpf/stackmap.c:268:
+		trace = get_perf_callchain(regs, kernel, user, max_depth, false, false, 0);

WARNING: line length of 87 exceeds 80 columns
#98: FILE: kernel/bpf/stackmap.c:311:
+		 * to reduce the length of preempt section, we can enable preempt here.

total: 0 errors, 3 warnings, 0 checks, 157 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 06d69eb88936 ("bpf: Add preempt disable for bpf_get_stackid") 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, 3 warnings, 0 checks, 157 lines checked