WARNING: line length of 96 exceeds 80 columns
#43: FILE: kernel/bpf/verifier.c:7816:
+			verbose(env, "map '%s' has to have BTF in order to use bpf_kptr_xchg\n",

WARNING: line length of 82 exceeds 80 columns
#96: FILE: kernel/bpf/verifier.c:8487:
+	/* local kptr types are allowed as the source argument of bpf_kptr_xchg */

WARNING: line length of 95 exceeds 80 columns
#97: FILE: kernel/bpf/verifier.c:8488:
+	if (meta->func_id == BPF_FUNC_kptr_xchg && type_is_alloc(type) && regno == BPF_REG_2) {

total: 0 errors, 3 warnings, 0 checks, 86 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 b1c374e5ebd5 ("bpf: Support bpf_kptr_xchg into local kptr") 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, 3 warnings, 0 checks, 86 lines checked