CHECK: DEFINE_MUTEX definition without comment #122: FILE: net/core/page_pool_user.c:22: +DEFINE_MUTEX(page_pools_lock); total: 0 errors, 0 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 76bc6b04f449 ("net: page_pool: don't try to stash the napi id") 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, 79 lines checked