CHECK: Comparison to NULL could be written "!nest" #70: FILE: net/sched/act_api.c:538: + if (nest == NULL) total: 0 errors, 0 warnings, 1 checks, 108 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 76cc25d1e659 ("net/sched: act_api: unexport tcf_action_dump_1()") 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, 0 warnings, 1 checks, 108 lines checked