x86: move some func calling from setup_arch to paging_init

those function depend on paging setup pgtable, so they could access
the ram in bootmem region but just get mapped.
Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/setup_32.c

@@ -249,7 +249,7 @@ static void __init reserve_initrd(void)
 
 #define MAX_MAP_CHUNK	(NR_FIX_BTMAPS << PAGE_SHIFT)
 
-static void __init post_reserve_initrd(void)
+void __init post_reserve_initrd(void)
 {
 	u64 ramdisk_image = boot_params.hdr.ramdisk_image;
 	u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
@@ -307,29 +307,11 @@ static void __init post_reserve_initrd(void)
 void __init reserve_initrd(void)
 {
 }
-static void __init post_reserve_initrd(void)
+void __init post_reserve_initrd(void)
 {
 }
 #endif /* CONFIG_BLK_DEV_INITRD */
 
-/*
- * The node 0 pgdat is initialized before all of these because
- * it's needed for bootmem.  node>0 pgdats have their virtual
- * space allocated before the pagetables are in place to access
- * them, so they can't be cleared then.
- *
- * This should all compile down to nothing when NUMA is off.
- */
-static void __init remapped_pgdat_init(void)
-{
-	int nid;
-
-	for_each_online_node(nid) {
-		if (nid != 0)
-			memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
-	}
-}
-
 #ifdef CONFIG_MCA
 static void set_mca_bus(int x)
 {
@@ -524,18 +506,6 @@ void __init setup_arch(char **cmdline_p)
 		init_ohci1394_dma_on_all_controllers();
 #endif
 
-	/*
-	 * NOTE: at this point the bootmem allocator is fully available.
-	 */
-
-	post_reserve_initrd();
-
-	remapped_pgdat_init();
-	sparse_init();
-	zone_sizes_init();
-
-	paravirt_post_allocator_init();
-
 #ifdef CONFIG_X86_GENERICARCH
 	generic_apic_probe();
 #endif

arch/x86/mm/init_32.c

@@ -705,6 +705,23 @@ void __init setup_bootmem_allocator(void)
 
 }
 
+/*
+ * The node 0 pgdat is initialized before all of these because
+ * it's needed for bootmem.  node>0 pgdats have their virtual
+ * space allocated before the pagetables are in place to access
+ * them, so they can't be cleared then.
+ *
+ * This should all compile down to nothing when NUMA is off.
+ */
+static void __init remapped_pgdat_init(void)
+{
+	int nid;
+
+	for_each_online_node(nid) {
+		if (nid != 0)
+			memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+	}
+}
 
 /*
  * paging_init() sets up the page tables - note that the first 8MB are
@@ -727,6 +744,18 @@ void __init paging_init(void)
 	__flush_tlb_all();
 
 	kmap_init();
+
+	/*
+	 * NOTE: at this point the bootmem allocator is fully available.
+	 */
+
+	post_reserve_initrd();
+
+	remapped_pgdat_init();
+	sparse_init();
+	zone_sizes_init();
+
+	paravirt_post_allocator_init();
 }
 
 /*

include/asm-x86/setup.h

@@ -39,6 +39,7 @@ void reserve_crashkernel(void);
 #include <asm/bootparam.h>
 
 void reserve_standard_io_resources(void);
+extern void post_reserve_initrd(void);
 
 #ifndef _SETUP