WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#57: FILE: tools/testing/selftests/bpf/prog_tests/timer_start_delete_race.c:34:
+	volatile bool start;

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#58: FILE: tools/testing/selftests/bpf/prog_tests/timer_start_delete_race.c:35:
+	volatile bool stop;

WARNING: line length of 81 exceeds 80 columns
#157: FILE: tools/testing/selftests/bpf/prog_tests/timer_start_delete_race.c:134:
+	/* Either KASAN will catch UAF or kernel will crash or nothing happens */

total: 0 errors, 3 warnings, 0 checks, 203 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 b071f33b7cb0 ("selftests/bpf: Add a test to stress bpf_timer_start and map_delete race") 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, 203 lines checked