WARNING: line length of 89 exceeds 80 columns
#41: FILE: kernel/bpf/hashtab.c:947:
+static void free_htab_elem(struct bpf_htab *htab, struct htab_elem *l, bool refill_extra)

CHECK: Comparison to NULL could be written "!cmpxchg_release"
#59: FILE: kernel/bpf/hashtab.c:964:
+			if (cmpxchg_release(extra, NULL, l) == NULL)

total: 0 errors, 1 warnings, 1 checks, 63 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 8a4ad553c3af ("bpf: Support refilling extra_elems in free_htab_elem()") 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, 1 warnings, 1 checks, 63 lines checked