WARNING: 'dependant' may be misspelled - perhaps 'dependent'?
#10: 
dependant, otherwise, we just need protection for mrt->mfc_hash
^^^^^^^^^

CHECK: struct mutex definition without comment
#31: FILE: include/net/netns/ipv4.h:284:
+	struct mutex		mfc_mutex;

total: 0 errors, 1 warnings, 1 checks, 80 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 cb9e3fe48759 ("ipmr: Add dedicated mutex for mrt->{mfc_hash,mfc_cache_list}.") 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.
total: 0 errors, 1 warnings, 1 checks, 80 lines checked