diff --git a/drivers/acpi/acpi_mrrm.c b/drivers/acpi/acpi_mrrm.c
index 2f22f013959a..26c1a4e6b6ec 100644
--- a/drivers/acpi/acpi_mrrm.c
+++ b/drivers/acpi/acpi_mrrm.c
@@ -14,7 +14,8 @@
 #include <linux/string.h>
 #include <linux/sysfs.h>
 
-static int max_mem_region = -ENOENT;
+/* Default assume one memory region covering all system memory, per the spec */
+static int max_mem_region = 1;
 
 /* Access for use by resctrl file system */
 int acpi_mrrm_max_mem_region(void)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index c409f4cecb09..d9ba7b4fa2cd 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1098,7 +1098,7 @@ static inline acpi_handle acpi_get_processor_handle(int cpu)
 
 static inline int acpi_mrrm_max_mem_region(void)
 {
-	return -ENOENT;
+	return 1;
 }
 
 #endif	/* !CONFIG_ACPI */