WARNING: line length of 95 exceeds 80 columns
#57: FILE: kernel/bpf/verifier.c:11141:
+static bool retval_range_within(struct bpf_retval_range range, const struct bpf_reg_state *reg)

CHECK: Please don't use multiple blank lines
#77: FILE: kernel/bpf/verifier.c:17806:
 
+

WARNING: line length of 93 exceeds 80 columns
#78: FILE: kernel/bpf/verifier.c:17807:
+static bool return_retval_range(struct bpf_verifier_env *env, struct bpf_retval_range *range)

WARNING: line length of 81 exceeds 80 columns
#156: FILE: kernel/bpf/verifier.c:17885:
+			if (range->minval == S32_MIN && range->maxval == S32_MAX)

WARNING: line length of 97 exceeds 80 columns
#206: FILE: kernel/bpf/verifier.c:17933:
+				/* See return_retval_range, can be 0 or 0-1 depending on hook. */

WARNING: line length of 113 exceeds 80 columns
#295: FILE: kernel/bpf/verifier.c:17994:
+	if (prog_type == BPF_PROG_TYPE_CGROUP_SKB && (env->prog->expected_attach_type == BPF_CGROUP_INET_EGRESS))

CHECK: Unnecessary parentheses around 'env->prog->expected_attach_type == BPF_CGROUP_INET_EGRESS'
#295: FILE: kernel/bpf/verifier.c:17994:
+	if (prog_type == BPF_PROG_TYPE_CGROUP_SKB && (env->prog->expected_attach_type == BPF_CGROUP_INET_EGRESS))

total: 0 errors, 5 warnings, 2 checks, 288 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 dac65c836b2f ("bpf: Factor out program return value calculation") 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, 5 warnings, 2 checks, 288 lines checked