sched_ext: Maintain an online cid mask in the scheduler arenagrafted

Schedulers on the default cid mapping treat [0, nr_online_cids) as the
online set and restart on hotplug. Schedulers that install their own mapping
with scx_bpf_cid_override() have no way to learn which cids are online: the
count no longer identifies members and the CPU-form cpumask is unusable from
cid programs. This is an obvious hole in the cid API.

Add scx_bpf_online_cmask(), a kernel-maintained cmask in the scheduler's
arena, allocated alongside the per-CPU scratch masks and populated after the
cid mapping is finalized and before ops.init(), for child schedulers too.
The pointer stays valid through ops.exit() with no reference to take. It is
the arena offset as a void pointer, the same form struct_ops arena arguments
arrive in. The verifier types the void return as a scalar for the program's
arena cast.

The mask follows the SCX hotplug notifications: seeded from cpu_active_mask
and updated before ops.cid_online/offline() runs, so it lags cpu_online_mask
only inside a hotplug transition. Updates walk the scheduler list under the
lock that also serializes unlinking. Reads are live, not atomic snapshots.
Root initialization excludes hotplug.

v2: Reworded the getter kerneldoc (Andrea Righi).

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>

1 files changed, 458 insertions, 0 deletions

diff --git a/tools/perf/util/Build b/tools/perf/util/Build
new file mode 100644
index 000000000..5e2265018
--- /dev/null
+++ b/tools/perf/util/Build
@@ -0,0 +1,458 @@
+include $(srctree)/tools/scripts/Makefile.include
+include $(srctree)/tools/scripts/utilities.mak
+
+perf-util-y += annotate-arch/
+perf-util-y += arm64-frame-pointer-unwind-support.o
+perf-util-y += addr2line.o
+perf-util-y += addr_location.o
+perf-util-y += annotate.o
+perf-util-y += aslr.o
+perf-util-y += blake2s.o
+perf-util-y += block-info.o
+perf-util-y += block-range.o
+perf-util-y += build-id.o
+perf-util-y += cacheline.o
+perf-util-$(CONFIG_LIBCAPSTONE) += capstone.o
+perf-util-y += config.o
+perf-util-y += copyfile.o
+perf-util-y += ctype.o
+perf-util-y += db-export.o
+perf-util-y += disasm.o
+perf-util-y += env.o
+perf-util-y += event.o
+perf-util-y += evlist.o
+perf-util-y += sideband_evlist.o
+perf-util-y += evsel.o
+perf-util-y += evsel_fprintf.o
+perf-util-y += perf_event_attr_fprintf.o
+perf-util-y += evswitch.o
+perf-util-y += find_bit.o
+perf-util-y += levenshtein.o
+perf-util-$(CONFIG_LIBBFD) += libbfd.o
+perf-util-y += llvm.o
+perf-util-y += mmap.o
+perf-util-y += memswap.o
+perf-util-y += parse-events.o
+perf-util-y += print-events.o
+perf-util-y += tracepoint.o
+perf-util-y += perf_regs.o
+perf-util-y += perf-regs-arch/
+perf-util-y += path.o
+perf-util-y += print_binary.o
+perf-util-y += print_insn.o
+perf-util-y += rlimit.o
+perf-util-y += argv_split.o
+perf-util-y += rbtree.o
+perf-util-y += libstring.o
+perf-util-y += bitmap.o
+perf-util-y += hweight.o
+perf-util-y += smt.o
+perf-util-y += strbuf.o
+perf-util-y += string.o
+perf-util-y += strlist.o
+perf-util-y += strfilter.o
+perf-util-y += top.o
+perf-util-y += usage.o
+perf-util-y += dso.o
+perf-util-y += dsos.o
+perf-util-y += symbol.o
+perf-util-y += symbol_fprintf.o
+perf-util-y += map_symbol.o
+perf-util-y += color.o
+perf-util-y += color_config.o
+perf-util-y += metricgroup.o
+perf-util-y += header.o
+perf-util-y += callchain.o
+perf-util-y += values.o
+perf-util-y += debug.o
+perf-util-y += fncache.o
+perf-util-y += machine.o
+perf-util-y += map.o
+perf-util-y += maps.o
+perf-util-y += pstack.o
+perf-util-y += session.o
+perf-util-y += tool.o
+perf-util-y += sample.o
+perf-util-y += sample-raw.o
+perf-util-y += s390-sample-raw.o
+perf-util-y += amd-sample-raw.o
+
+perf-util-y += ordered-events.o
+perf-util-y += namespaces.o
+perf-util-y += comm.o
+perf-util-y += thread.o
+perf-util-y += threads.o
+perf-util-y += thread_map.o
+perf-util-y += parse-events-flex.o
+perf-util-y += parse-events-bison.o
+perf-util-y += pmu.o
+perf-util-y += pmus.o
+perf-util-y += pmu-flex.o
+perf-util-y += pmu-bison.o
+perf-util-y += drm_pmu.o
+perf-util-y += hwmon_pmu.o
+perf-util-y += tool_pmu.o
+perf-util-y += tp_pmu.o
+perf-util-y += svghelper.o
+perf-util-y += trace-event-info.o
+perf-util-y += trace-event-scripting.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += trace-event.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += trace-event-parse.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += trace-event-read.o
+perf-util-y += sort.o
+perf-util-y += hist.o
+perf-util-y += util.o
+perf-util-y += cpumap.o
+perf-util-y += affinity.o
+perf-util-y += cputopo.o
+perf-util-y += cgroup.o
+perf-util-y += target.o
+perf-util-y += rblist.o
+perf-util-y += intlist.o
+perf-util-y += vdso.o
+perf-util-y += counts.o
+perf-util-y += stat.o
+perf-util-y += stat-shadow.o
+perf-util-y += stat-display.o
+perf-util-y += perf_api_probe.o
+perf-util-y += record.o
+perf-util-y += srcline.o
+perf-util-y += srccode.o
+perf-util-y += synthetic-events.o
+perf-util-y += data.o
+perf-util-y += tsc.o
+perf-util-y += cloexec.o
+perf-util-y += call-path.o
+perf-util-y += rwsem.o
+perf-util-y += thread-stack.o
+perf-util-y += spark.o
+perf-util-y += topdown.o
+perf-util-y += iostat.o
+perf-util-y += stream.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
+perf-util-y += kvm-stat-arch/
+perf-util-y += lock-contention.o
+perf-util-y += auxtrace.o
+perf-util-y += intel-pt-decoder/
+perf-util-y += intel-pt.o
+perf-util-y += intel-bts.o
+perf-util-y += arm-spe.o
+perf-util-y += arm-spe-decoder/
+perf-util-y += hisi-ptt.o
+perf-util-y += hisi-ptt-decoder/
+perf-util-y += s390-cpumsf.o
+perf-util-y += powerpc-vpadtl.o
+
+ifdef CONFIG_LIBOPENCSD
+perf-util-y += cs-etm.o
+perf-util-y += cs-etm-decoder/
+endif
+perf-util-y += cs-etm-base.o
+
+perf-util-y += parse-branch-options.o
+perf-util-y += parse-regs-options.o
+perf-util-y += parse-sublevel-options.o
+perf-util-y += term.o
+perf-util-y += help-unknown-cmd.o
+perf-util-y += dlfilter.o
+perf-util-y += mem-events.o
+perf-util-y += mem-info.o
+perf-util-y += vsprintf.o
+perf-util-y += units.o
+perf-util-y += time-utils.o
+perf-util-y += expr-flex.o
+perf-util-y += expr-bison.o
+perf-util-y += expr.o
+perf-util-y += branch.o
+perf-util-y += mem2node.o
+perf-util-y += clockid.o
+perf-util-y += list_sort.o
+perf-util-y += mutex.o
+perf-util-y += sharded_mutex.o
+perf-util-y += intel-tpebs.o
+
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_counter_cgroup.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_ftrace.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_off_cpu.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf-filter.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf-filter-flex.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf-filter-bison.o
+perf-util-$(CONFIG_PERF_BPF_SKEL) += btf.o
+
+ifeq ($(CONFIG_TRACE),y)
+  perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf-trace-summary.o
+  perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_trace_augment.o
+endif
+
+ifeq ($(CONFIG_LIBTRACEEVENT),y)
+  perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_lock_contention.o
+endif
+
+ifeq ($(CONFIG_LIBTRACEEVENT),y)
+  perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_kwork.o
+  perf-util-$(CONFIG_PERF_BPF_SKEL) += bpf_kwork_top.o
+endif
+
+perf-util-$(CONFIG_LIBELF) += symbol-elf.o
+perf-util-$(CONFIG_LIBELF) += probe-file.o
+perf-util-$(CONFIG_LIBELF) += probe-event.o
+
+ifdef CONFIG_LIBBPF_DYNAMIC
+  hashmap := 1
+endif
+ifndef CONFIG_LIBBPF
+  hashmap := 1
+endif
+
+ifdef hashmap
+perf-util-y += hashmap.o
+endif
+
+ifndef CONFIG_LIBELF
+perf-util-y += symbol-minimal.o
+endif
+
+ifndef CONFIG_SETNS
+perf-util-y += setns.o
+endif
+
+perf-util-y += unwind.o
+perf-util-$(CONFIG_LIBDW) += probe-finder.o
+perf-util-$(CONFIG_LIBDW) += dwarf-aux.o
+perf-util-$(CONFIG_LIBDW) += dwarf-regs.o
+perf-util-$(CONFIG_LIBDW) += dwarf-regs-arch/
+perf-util-$(CONFIG_LIBDW) += debuginfo.o
+perf-util-$(CONFIG_LIBDW) += annotate-data.o
+perf-util-$(CONFIG_LIBDW) += libdw.o
+perf-util-$(CONFIG_LIBDW) += unwind-libdw.o
+
+perf-util-$(CONFIG_LIBUNWIND)          += unwind-libunwind.o
+perf-util-$(CONFIG_LIBUNWIND)          += libunwind-arch/
+
+ifeq ($(CONFIG_LIBTRACEEVENT),y)
+  perf-util-$(CONFIG_BABELTRACE2_CTF_WRITER) += data-convert-bt.o
+endif
+
+perf-util-y += data-convert-json.o
+
+perf-util-y += scripting-engines/
+
+perf-util-$(CONFIG_ZLIB) += zlib.o
+perf-util-$(CONFIG_LZMA) += lzma.o
+perf-util-$(CONFIG_ZSTD) += zstd.o
+
+perf-util-y += cap.o
+
+perf-util-$(CONFIG_CXX_DEMANGLE) += demangle-cxx.o
+perf-util-y += demangle-ocaml.o
+perf-util-y += demangle-java.o
+perf-util-y += demangle-rust-v0.o
+perf-util-$(CONFIG_LIBLLVM) += llvm-c-helpers.o
+
+CFLAGS_demangle-rust-v0.o += -Wno-shadow -Wno-declaration-after-statement \
+    -Wno-switch-default -Wno-switch-enum -Wno-missing-field-initializers
+
+ifdef CONFIG_JITDUMP
+perf-util-$(CONFIG_LIBELF) += jitdump.o
+perf-util-$(CONFIG_LIBELF) += genelf.o
+perf-util-$(CONFIG_LIBDW) += genelf_debug.o
+endif
+
+perf-util-y += perf-hooks.o
+
+perf-util-$(CONFIG_LIBBPF) += bpf-event.o
+perf-util-$(CONFIG_LIBBPF) += bpf-utils.o
+
+perf-util-$(CONFIG_LIBPFM4) += pfm.o
+
+CFLAGS_config.o   += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
+
+# avoid compiler warnings in 32-bit mode
+CFLAGS_genelf_debug.o  += -Wno-packed
+
+$(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-flex.h: util/parse-events.l $(OUTPUT)util/parse-events-bison.c
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/parse-events-flex.c \
+		--header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) $<
+
+$(OUTPUT)util/parse-events-bison.c $(OUTPUT)util/parse-events-bison.h: util/parse-events.y
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) $(BISON_FALLBACK_FLAGS) \
+		-o $(OUTPUT)util/parse-events-bison.c -p parse_events_
+
+$(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-flex.h: util/expr.l $(OUTPUT)util/expr-bison.c
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/expr-flex.c \
+		--header-file=$(OUTPUT)util/expr-flex.h $(PARSER_DEBUG_FLEX) $<
+
+$(OUTPUT)util/expr-bison.c $(OUTPUT)util/expr-bison.h: util/expr.y
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \
+		-o $(OUTPUT)util/expr-bison.c -p expr_
+
+$(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-flex.h: util/pmu.l $(OUTPUT)util/pmu-bison.c
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/pmu-flex.c \
+		--header-file=$(OUTPUT)util/pmu-flex.h $(PARSER_DEBUG_FLEX) $<
+
+$(OUTPUT)util/pmu-bison.c $(OUTPUT)util/pmu-bison.h: util/pmu.y
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \
+		-o $(OUTPUT)util/pmu-bison.c -p perf_pmu_
+
+$(OUTPUT)util/bpf-filter-flex.c $(OUTPUT)util/bpf-filter-flex.h: util/bpf-filter.l $(OUTPUT)util/bpf-filter-bison.c util/bpf-filter.h util/bpf_skel/sample-filter.h
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,flex)$(FLEX) -o $(OUTPUT)util/bpf-filter-flex.c \
+		--header-file=$(OUTPUT)util/bpf-filter-flex.h $(PARSER_DEBUG_FLEX) $<
+
+$(OUTPUT)util/bpf-filter-bison.c $(OUTPUT)util/bpf-filter-bison.h: util/bpf-filter.y util/bpf-filter.h util/bpf_skel/sample-filter.h
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,bison)$(BISON) -v $< -d $(PARSER_DEBUG_BISON) $(BISON_FILE_PREFIX_MAP) \
+		-o $(OUTPUT)util/bpf-filter-bison.c -p perf_bpf_filter_
+
+FLEX_VERSION := $(shell $(FLEX) --version | cut -d' ' -f2)
+
+FLEX_GE_260 := $(call version-ge3,$(FLEX_VERSION),2.6.0)
+ifeq ($(FLEX_GE_260),1)
+  flex_flags := -Wno-redundant-decls -Wno-switch-default -Wno-unused-function -Wno-misleading-indentation
+
+  # Some newer clang and gcc version complain about this
+  # util/parse-events-bison.c:1317:9: error: variable 'parse_events_nerrs' set but not used [-Werror,-Wunused-but-set-variable]
+  #  int yynerrs = 0;
+
+  flex_flags += -Wno-unused-but-set-variable
+
+  FLEX_LT_262 := $(call version-lt3,$(FLEX_VERSION),2.6.2)
+  ifeq ($(FLEX_LT_262),1)
+    flex_flags += -Wno-sign-compare
+  endif
+else
+  flex_flags := -w
+endif
+
+# Some newer clang and gcc version complain about this
+# util/parse-events-bison.c:1317:9: error: variable 'parse_events_nerrs' set but not used [-Werror,-Wunused-but-set-variable]
+#  int yynerrs = 0;
+
+bison_flags := -DYYENABLE_NLS=0 -Wno-unused-but-set-variable
+
+# Old clangs don't grok -Wno-unused-but-set-variable, remove it
+ifeq ($(CC_NO_CLANG), 0)
+  CLANG_VERSION := $(shell $(CLANG) --version | head -1 | sed 's/.*clang version \([[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+\).*/\1/g')
+  ifeq ($(call version-lt3,$(CLANG_VERSION),13.0.0),1)
+    bison_flags := $(subst -Wno-unused-but-set-variable,,$(bison_flags))
+    flex_flags := $(subst -Wno-unused-but-set-variable,,$(flex_flags))
+  endif
+endif
+
+BISON_GE_382 := $(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\).\([0-9]\+\)/\1\2\3/g') \>\= 382)
+ifeq ($(BISON_GE_382),1)
+  bison_flags += -Wno-switch-enum
+else
+  bison_flags += -w
+endif
+
+BISON_LT_381 := $(shell expr $(shell $(BISON) --version | grep bison | sed -e 's/.\+ \([0-9]\+\).\([0-9]\+\).\([0-9]\+\)/\1\2\3/g') \< 381)
+ifeq ($(BISON_LT_381),1)
+  bison_flags += -DYYNOMEM=YYABORT
+endif
+
+CFLAGS_parse-events-flex.o  += $(flex_flags) -Wno-unused-label
+CFLAGS_pmu-flex.o           += $(flex_flags)
+CFLAGS_expr-flex.o          += $(flex_flags)
+CFLAGS_bpf-filter-flex.o    += $(flex_flags)
+
+CFLAGS_parse-events-bison.o += $(bison_flags)
+CFLAGS_pmu-bison.o          += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)
+CFLAGS_expr-bison.o         += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)
+CFLAGS_bpf-filter-bison.o   += -DYYLTYPE_IS_TRIVIAL=0 $(bison_flags)
+
+$(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c
+$(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
+$(OUTPUT)util/expr.o: $(OUTPUT)util/expr-flex.c $(OUTPUT)util/expr-bison.c
+$(OUTPUT)util/bpf-filter.o: $(OUTPUT)util/bpf-filter-flex.c $(OUTPUT)util/bpf-filter-bison.c
+
+CFLAGS_bitmap.o        += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
+CFLAGS_find_bit.o      += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
+CFLAGS_rbtree.o        += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
+CFLAGS_libstring.o     += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
+CFLAGS_hweight.o       += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
+CFLAGS_header.o        += -include $(OUTPUT)PERF-VERSION-FILE
+CFLAGS_arm-spe.o       += -I$(srctree)/tools/arch/arm64/include/ -I$(OUTPUT)arch/arm64/include/generated/
+
+$(OUTPUT)util/argv_split.o: ../lib/argv_split.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/bitmap.o: ../lib/bitmap.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/ctype.o: ../lib/ctype.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/find_bit.o: ../lib/find_bit.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/rbtree.o: ../lib/rbtree.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/libstring.o: ../lib/string.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/vsprintf.o: ../lib/vsprintf.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)util/list_sort.o: ../lib/list_sort.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)
+
+PY_TESTS := setup.py
+ifdef MYPY
+  MYPY_TEST_LOGS := $(PY_TESTS:%=%.mypy_log)
+else
+  MYPY_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.mypy_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)mypy "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-util-y += $(MYPY_TEST_LOGS)
+
+ifdef PYLINT
+  PYLINT_TEST_LOGS := $(PY_TESTS:%=%.pylint_log)
+else
+  PYLINT_TEST_LOGS :=
+endif
+
+$(OUTPUT)%.pylint_log: %
+	$(call rule_mkdir)
+	$(Q)$(call echo-cmd,test)pylint "$<" > $@ || (cat $@ && rm $@ && false)
+
+perf-util-y += $(PYLINT_TEST_LOGS)
+
+ifeq ($(CONFIG_PERF_BPF_SKEL),y)
+include $(srctree)/tools/perf/bpf_skel.mak
+
+$(OUTPUT)util/bpf_ftrace.o: $(SKEL_OUT)/func_latency.skel.h
+$(OUTPUT)util/bpf-filter.o: $(SKEL_OUT)/sample_filter.skel.h
+$(OUTPUT)util/bpf_kwork_top.o: $(SKEL_OUT)/kwork_top.skel.h
+$(OUTPUT)util/bpf_off_cpu.o: $(SKEL_OUT)/off_cpu.skel.h
+$(OUTPUT)util/bpf-trace-summary.o: $(SKEL_OUT)/syscall_summary.skel.h
+$(OUTPUT)util/bpf_counter_cgroup.o: $(SKEL_OUT)/bperf_cgroup.skel.h
+$(OUTPUT)util/bpf_trace_augment.o: $(SKEL_OUT)/augmented_raw_syscalls.skel.h
+$(OUTPUT)util/bpf_counter.o: $(SKEL_OUT)/bpf_prog_profiler.skel.h $(SKEL_OUT)/bperf_leader.skel.h $(SKEL_OUT)/bperf_follower.skel.h
+$(OUTPUT)util/bpf_lock_contention.o: $(SKEL_OUT)/lock_contention.skel.h
+$(OUTPUT)util/bpf_kwork.o: $(SKEL_OUT)/kwork_trace.skel.h
+endif