WARNING: quoted string split across lines
#168: FILE: tools/testing/selftests/bpf/prog_tests/lsm_bdev.c:146:
+		 "veritysetup format %s %s 2>/dev/null | "
+		 "grep -i 'root hash' | awk '{print $NF}'",

WARNING: line length of 89 exceeds 80 columns
#272: FILE: tools/testing/selftests/bpf/progs/lsm_bdev.c:23:
+	__u8  sig_valid;	/* LSM_INT_DMVERITY_SIG_VALID value (non-NULL = valid) */

CHECK: Comparison to NULL could be written "value"
#316: FILE: tools/testing/selftests/bpf/progs/lsm_bdev.c:67:
+		info->sig_valid = (value != NULL);

total: 0 errors, 2 warnings, 1 checks, 317 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 7b10a1cb41a1 ("selftests/bpf: add block device management selftests") 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, 2 warnings, 1 checks, 317 lines checked