WARNING: line length of 81 exceeds 80 columns
#47: FILE: include/linux/bpf.h:2123:
+	return type == BPF_TRACE_FENTRY_MULTI || type == BPF_TRACE_FEXIT_MULTI ||

WARNING: line length of 100 exceeds 80 columns
#56: FILE: include/linux/bpf.h:2248:
+		if (fentries.nodes[i]->link->prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI)

WARNING: line length of 90 exceeds 80 columns
#118: FILE: kernel/bpf/trampoline.c:185:
+		    eatype == BPF_TRACE_FENTRY_MULTI || eatype == BPF_TRACE_FEXIT_MULTI ||

WARNING: line length of 84 exceeds 80 columns
#140: FILE: kernel/bpf/trampoline.c:832:
+		link = container_of(node->link, struct bpf_tracing_link, link.link);

WARNING: line length of 85 exceeds 80 columns
#146: FILE: kernel/bpf/trampoline.c:838:
+		link = container_of(node->link, struct bpf_tracing_multi_link, link);

WARNING: line length of 87 exceeds 80 columns
#173: FILE: kernel/bpf/trampoline.c:878:
+		hlist_add_head(&fexit->tramp_hlist, &tr->progs_hlist[BPF_TRAMP_FEXIT]);

WARNING: line length of 86 exceeds 80 columns
#202: FILE: kernel/bpf/trampoline.c:1643:
+			link->fexits[i].cookie = link->cookies ? link->cookies[i] : 0;

WARNING: line length of 83 exceeds 80 columns
#226: FILE: kernel/bpf/verifier.c:19299:
+		     tgt_prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI)) {

CHECK: Alignment should match open parenthesis
#239: FILE: kernel/bpf/verifier.c:19403:
+		if ((prog->expected_attach_type == BPF_TRACE_FSESSION ||
+		    prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI) &&

WARNING: line length of 83 exceeds 80 columns
#275: FILE: kernel/bpf/verifier.c:19958:
+		    env->prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI)) {

CHECK: Blank lines aren't necessary after an open brace '{'
#276: FILE: kernel/bpf/verifier.c:19959:
+		    env->prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI)) {
+

WARNING: line length of 83 exceeds 80 columns
#286: FILE: kernel/bpf/verifier.c:19973:
+		    env->prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI)) {

total: 0 errors, 10 warnings, 2 checks, 283 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 266fc8411a88 ("bpf: Add support for tracing_multi link session") 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, 2 checks, 283 lines checked