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-rw-r--r--include/hw/acpi/vmgenid.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/acpi/vmgenid.h b/include/hw/acpi/vmgenid.h
index 8578476bae..7beb9592fb 100644
--- a/include/hw/acpi/vmgenid.h
+++ b/include/hw/acpi/vmgenid.h
@@ -24,6 +24,7 @@ typedef struct VmGenIdState {
     bool write_pointer_available;
 } VmGenIdState;
 
+/* returns NULL unless there is exactly one device */
 static inline Object *find_vmgenid_dev(void)
 {
     return object_resolve_path_type("", VMGENID_DEVICE, NULL);