ERROR: code indent should use tabs where possible
#103: FILE: net/ipv4/ip_output.c:1054:
+                if (cork->ts_opt_id) {$

WARNING: please, no spaces at the start of a line
#103: FILE: net/ipv4/ip_output.c:1054:
+                if (cork->ts_opt_id) {$

ERROR: code indent should use tabs where possible
#104: FILE: net/ipv4/ip_output.c:1055:
+                        hold_tskey = false;$

WARNING: please, no spaces at the start of a line
#104: FILE: net/ipv4/ip_output.c:1055:
+                        hold_tskey = false;$

ERROR: code indent should use tabs where possible
#105: FILE: net/ipv4/ip_output.c:1056:
+                        tskey = cork->ts_opt_id;$

WARNING: please, no spaces at the start of a line
#105: FILE: net/ipv4/ip_output.c:1056:
+                        tskey = cork->ts_opt_id;$

ERROR: code indent should use tabs where possible
#106: FILE: net/ipv4/ip_output.c:1057:
+                } else {$

WARNING: please, no spaces at the start of a line
#106: FILE: net/ipv4/ip_output.c:1057:
+                } else {$

ERROR: code indent should use tabs where possible
#107: FILE: net/ipv4/ip_output.c:1058:
+                        tskey = atomic_inc_return(&sk->sk_tskey) - 1;$

WARNING: please, no spaces at the start of a line
#107: FILE: net/ipv4/ip_output.c:1058:
+                        tskey = atomic_inc_return(&sk->sk_tskey) - 1;$

ERROR: code indent should use tabs where possible
#108: FILE: net/ipv4/ip_output.c:1059:
+                }$

WARNING: please, no spaces at the start of a line
#108: FILE: net/ipv4/ip_output.c:1059:
+                }$

total: 6 errors, 6 warnings, 0 checks, 88 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 c1b43b61c129 ("net_tstamp: add SCM_TS_OPT_ID to provide OPT_ID in control message") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE 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.