add ARCH_SETUP hook

arch/i386/generic/setup_arch.h

-#ifdef SETUP_POST
+#ifndef SETUP_POST
+#define ARCH_SETUP
+#else
 static inline char * __init machine_specific_memory_setup(void)
 {
 	char *who;

arch/i386/kernel/setup.c

@@ -676,6 +676,7 @@ void __init setup_arch(char **cmdline_p)
 	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 #endif
+	ARCH_SETUP
 	setup_memory_region();
 
 	if (!MOUNT_ROOT_RDONLY)

arch/i386/visws/setup_arch.h

-#ifdef SETUP_POST
+#ifndef SETUP_POST
+#define ARCH_SETUP
+#else
 static inline char * __init machine_specific_memory_setup(void)
 {
 	char *who;