==========
checkpatch - FAILED

ERROR: code indent should use tabs where possible
#82: FILE: lib/vsprintf.c:1997:
+                     struct printf_spec spec, const char *fmt)$

WARNING: please, no spaces at the start of a line
#82: FILE: lib/vsprintf.c:1997:
+                     struct printf_spec spec, const char *fmt)$

WARNING: line length of 91 exceeds 80 columns
#110: FILE: lib/vsprintf.c:2025:
+		return timespec64_str(buf, end, (const struct timespec64 *)ptr, spec, fmt);

total: 1 errors, 2 warnings, 0 checks, 85 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.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

Commit 493172b64f45 ("lib/vsprintf: Add specifier for printing struct timespec64") 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.