WARNING: 'unknonw' may be misspelled - perhaps 'unknown'?
#18: 
arithmetic shift propagates 1s (making upper bits unknonw). If known (0),
                                                  ^^^^^^^

total: 0 errors, 1 warnings, 0 checks, 28 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 05496d8f668e ("bpf: Introduce tnum_scast as a tnum native sign extension helper") 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, 1 warnings, 0 checks, 28 lines checked