create firmware subsystem and register it on startup.

drivers/base/Makefile

@@ -2,13 +2,14 @@
 
 obj-y		:= core.o sys.o interface.o power.o bus.o \
 			driver.o class.o intf.o platform.o \
-			cpu.o
+			cpu.o firmware.o
 
 obj-y		+= fs/
 
 obj-$(CONFIG_HOTPLUG)	+= hotplug.o
 
 export-objs	:= core.o power.o sys.o bus.o driver.o \
-			class.o intf.o platform.o cpu.o 
+			class.o intf.o platform.o cpu.o  \
+			firmware.o
 
 include $(TOPDIR)/Rules.make

drivers/base/firmware.c

+/*
+ * firmware.c - firmware subsystem hoohaw.
+ */
+
+#include <linux/kobject.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+static struct subsystem firmware_subsys = {
+	.kobj	= { .name = "firmware" },
+};
+
+int firmware_register(struct subsystem * s)
+{
+	s->parent = &firmware_subsys;
+	return subsystem_register(s);
+}
+
+void firmware_unregister(struct subsystem * s)
+{
+	subsystem_unregister(s);
+}
+
+static int __init firmware_init(void)
+{
+	return subsystem_register(&firmware_subsys);
+}
+
+core_initcall(firmware_init);
+
+EXPORT_SYMBOL(firmware_register);
+EXPORT_SYMBOL(firmware_unregister);