CHECK: Please use a blank line after function/struct/union/enum declarations
#30: FILE: include/net/route.h:201:
 }
+enum skb_drop_reason

WARNING: line length of 83 exceeds 80 columns
#103: FILE: net/ipv4/route.c:1712:
+	reason = ip_mc_validate_source(skb, daddr, saddr, tos, dev, in_dev, &itag);

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, 2 warnings, 1 checks, 79 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 9735e871d7cd ("net: ip: make ip_mc_validate_source() return drop reason") 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, 2 warnings, 1 checks, 79 lines checked