WARNING: line length of 82 exceeds 80 columns
#68: FILE: include/linux/skbuff.h:1124:
+	/* the latency from the driver to the skb entering the L4 in input path */

CHECK: extern prototypes should be avoided in .h files
#77: FILE: include/linux/skbuff.h:1133:
+extern int skb_latency_regfunc(void);

CHECK: extern prototypes should be avoided in .h files
#78: FILE: include/linux/skbuff.h:1134:
+extern void skb_latency_unregfunc(void);

CHECK: Alignment should match open parenthesis
#102: FILE: include/trace/events/skb.h:96:
+TRACE_EVENT_FN(skb_latency,
+

WARNING: line length of 83 exceeds 80 columns
#103: FILE: include/trace/events/skb.h:97:
+	TP_PROTO(struct sk_buff *skb, struct sock *sk, enum skb_latency_type type),

CHECK: Lines should not end with a '('
#107: FILE: include/trace/events/skb.h:101:
+	TP_STRUCT__entry(

CHECK: Lines should not end with a '('
#114: FILE: include/trace/events/skb.h:108:
+	TP_fast_assign(

WARNING: line length of 82 exceeds 80 columns
#328: FILE: net/ipv4/tcp_output.c:4056:
+	skb_set_delivery_time(syn_data, tp->tcp_clock_cache, SKB_CLOCK_MONOTONIC);

WARNING: From:/Signed-off-by: email address mismatch: 'From: Menglong Dong <menglong8.dong@gmail.com>' != 'Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>'

total: 0 errors, 4 warnings, 5 checks, 238 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 729d2a2d4f03 ("net: tcp: add tracepoint skb_latency for latency monitor") 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.
total: 0 errors, 4 warnings, 5 checks, 238 lines checked