CHECK: Comparison to NULL could be written "!filp" #52: FILE: net/netfilter/xt_owner.c:87: + if (filp == NULL) total: 0 errors, 0 warnings, 1 checks, 61 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 1ed98aa06cb4 ("netfilter: xt_owner: no longer acquire sk_callback_lock in mt_owner()") 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, 0 warnings, 1 checks, 61 lines checked