WARNING: 'prefered' may be misspelled - perhaps 'preferred'?
#19: 
prefered/valid time to 0, and later in addrconf_verify_rtnl() all checkings
^^^^^^^^

WARNING: line length of 81 exceeds 80 columns
#92: FILE: net/ipv6/addrconf.c:4978:
+					 cfg->preferred_lft, !was_managetempaddr,

total: 0 errors, 2 warnings, 0 checks, 60 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 881c220cd3b7 ("net/ipv6: delete temporary address if mngtmpaddr is removed or unmanaged") 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, 0 checks, 60 lines checked