WARNING: line length of 100 exceeds 80 columns
#38: FILE: include/linux/bpf.h:1253:
+	BPF_BRANCH_SNAPSHOT_F_COPY	= 1,	/* Copy branch snapshot from bpf_branch_snapshot. */

WARNING: line length of 102 exceeds 80 columns
#52: FILE: include/linux/bpf_verifier.h:564:
+	bool copy_branch_snapshot; /* BPF_BRANCH_SNAPSHOT_F_COPY for bpf_get_branch_snapshot helper */

WARNING: line length of 97 exceeds 80 columns
#69: FILE: kernel/bpf/verifier.c:11780:
+			verbose(env, "Flags in bpf_get_branch_snapshot helper must be const.\n");

WARNING: line length of 91 exceeds 80 columns
#74: FILE: kernel/bpf/verifier.c:11785:
+			verbose(env, "Invalid flags in bpf_get_branch_snapshot helper.\n");

WARNING: line length of 83 exceeds 80 columns
#80: FILE: kernel/bpf/verifier.c:11791:
+			    (env->prog->expected_attach_type != BPF_TRACE_FENTRY &&

WARNING: line length of 83 exceeds 80 columns
#81: FILE: kernel/bpf/verifier.c:11792:
+			     env->prog->expected_attach_type != BPF_TRACE_FEXIT)) {

WARNING: line length of 117 exceeds 80 columns
#82: FILE: kernel/bpf/verifier.c:11793:
+				verbose(env, "Only fentry and fexit programs support BPF_BRANCH_SNAPSHOT_F_COPY.\n");

WARNING: line length of 81 exceeds 80 columns
#86: FILE: kernel/bpf/verifier.c:11797:
+			env->insn_aux_data[insn_idx].copy_branch_snapshot = true;

WARNING: line length of 84 exceeds 80 columns
#116: FILE: kernel/trace/bpf_trace.c:1176:
+		entry_cnt = static_call(perf_snapshot_branch_stack)(buf, entry_cnt);

WARNING: line length of 85 exceeds 80 columns
#124: FILE: kernel/trace/bpf_trace.c:1184:
+			memcpy(buf, (void *) br->entries, entry_cnt * br_entry_size);

CHECK: No space is necessary after a cast
#124: FILE: kernel/trace/bpf_trace.c:1184:
+			memcpy(buf, (void *) br->entries, entry_cnt * br_entry_size);

total: 0 errors, 10 warnings, 1 checks, 89 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 980ac8beacc2 ("bpf: Introduce BPF_BRANCH_SNAPSHOT_F_COPY flag for bpf_get_branch_snapshot helper") 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, 10 warnings, 1 checks, 89 lines checked