4 files changed, 30 insertions, 13 deletions
diff --git a/pkg/subsystem/list.go b/pkg/subsystem/list.go
index d512a3fe1..c3650e7f9 100644
--- a/pkg/subsystem/list.go
+++ b/pkg/subsystem/list.go
@@ -3,6 +3,8 @@
 
 package subsystem
 
+import "fmt"
+
 // In general, it's not correct to assume that subsystems are only determined by target.OS,
 // because subsystems are related not to the user interface of the OS kernel, but rather to
 // the OS kernel implementation.
@@ -13,20 +15,36 @@ package subsystem
 // Therefore, subsystem lists have to be a completely different entity.
 
 var (
-	lists = make(map[string][]*Subsystem)
+	lists = make(map[string]registeredSubsystem)
 )
 
-func RegisterList(name string, list []*Subsystem) {
+type registeredSubsystem struct {
+	list     []*Subsystem
+	revision int
+}
+
+func RegisterList(name string, list []*Subsystem, revision int) {
 	if _, ok := lists[name]; ok {
 		panic(name + " subsystem list already exists!")
 	}
-	lists[name] = list
+	lists[name] = registeredSubsystem{
+		list:     list,
+		revision: revision,
+	}
 }
 
 func GetList(name string) []*Subsystem {
-	return lists[name]
+	info, ok := lists[name]
+	if !ok {
+		panic(fmt.Sprintf("list %q is not registered", name))
+	}
+	return info.list
 }
 
 func ListService(name string) *Service {
-	return MustMakeService(lists[name])
+	info, ok := lists[name]
+	if !ok {
+		panic(fmt.Sprintf("list %q is not registered", name))
+	}
+	return MustMakeService(info.list, info.revision)
 }
diff --git a/pkg/subsystem/lists/linux.go b/pkg/subsystem/lists/linux.go
index e94fdb9fb..274db98c0 100644
--- a/pkg/subsystem/lists/linux.go
+++ b/pkg/subsystem/lists/linux.go
@@ -6,7 +6,7 @@ package lists
 import . "github.com/google/syzkaller/pkg/subsystem"
 
 func init() {
-	RegisterList("linux", subsystems_linux())
+	RegisterList("linux", subsystems_linux(), 20250720)
 }
 
 // The subsystem list:
diff --git a/pkg/subsystem/service.go b/pkg/subsystem/service.go
index 24f86dd54..a921cdfed 100644
--- a/pkg/subsystem/service.go
+++ b/pkg/subsystem/service.go
@@ -9,22 +9,20 @@ import (
 
 type Service struct {
 	*Extractor
+	Revision  int
 	perName   map[string]*Subsystem
 	perParent map[*Subsystem][]*Subsystem
 }
 
-func MustMakeService(list []*Subsystem) *Service {
-	if len(list) == 0 {
-		panic("the subsystem list is empty")
-	}
-	service, err := MakeService(list)
+func MustMakeService(list []*Subsystem, revision int) *Service {
+	service, err := MakeService(list, revision)
 	if err != nil {
 		panic(fmt.Sprintf("service creation failed: %s", err))
 	}
 	return service
 }
 
-func MakeService(list []*Subsystem) (*Service, error) {
+func MakeService(list []*Subsystem, revision int) (*Service, error) {
 	extractor := MakeExtractor(list)
 	perName := map[string]*Subsystem{}
 	perParent := map[*Subsystem][]*Subsystem{}
@@ -42,6 +40,7 @@ func MakeService(list []*Subsystem) (*Service, error) {
 	}
 	return &Service{
 		Extractor: extractor,
+		Revision:  revision,
 		perName:   perName,
 		perParent: perParent,
 	}, nil
diff --git a/pkg/subsystem/service_test.go b/pkg/subsystem/service_test.go
index 2a95b9558..d45a62806 100644
--- a/pkg/subsystem/service_test.go
+++ b/pkg/subsystem/service_test.go
@@ -14,6 +14,6 @@ func TestServiceChildren(t *testing.T) {
 	parent := &Subsystem{Name: "parent"}
 	childA := &Subsystem{Name: "childA", Parents: []*Subsystem{parent}}
 	childB := &Subsystem{Name: "childB", Parents: []*Subsystem{parent}}
-	service := MustMakeService([]*Subsystem{unrelated, parent, childA, childB})
+	service := MustMakeService([]*Subsystem{unrelated, parent, childA, childB}, 1)
 	assert.ElementsMatch(t, service.Children(parent), []*Subsystem{childA, childB})
 }