ERROR: code indent should use tabs where possible
#30: FILE: net/key/af_key.c:3907:
+^I             "please contact the netdev mailing list\n");$

WARNING: quoted string split across lines
#30: FILE: net/key/af_key.c:3907:
+	pr_warn_once("PFKEY is deprecated and scheduled to be removed in 2027, "
+	             "please contact the netdev mailing list\n");

total: 1 errors, 1 warnings, 0 checks, 29 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 9a66842b6669 ("pfkey: Deprecate pfkey") 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.