From 3486892f998fea5b4f1a0a4d093f09b7d0024696 Mon Sep 17 00:00:00 2001
From: Rob Herring <rob.herring@calxeda.com>
Date: Mon, 26 Aug 2013 11:23:50 -0500
Subject: openrisc: use unflatten_and_copy_device_tree

Use the common unflatten_and_copy_device_tree to copy the built-in FDT
out of init section. This moves the copy later in the boot, but there
do not appear to be any references to strings in the FDT before the copy.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: linux@lists.openrisc.net

diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c
index bf3fd05..3b94972 100644
--- a/arch/openrisc/kernel/prom.c
+++ b/arch/openrisc/kernel/prom.c
@@ -55,8 +55,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 
 void __init early_init_devtree(void *params)
 {
-	void *alloc;
-
 	/* Setup flat device-tree pointer */
 	initial_boot_params = params;
 
@@ -72,17 +70,6 @@ void __init early_init_devtree(void *params)
 	of_scan_flat_dt(early_init_dt_scan_memory, NULL);
 
 	memblock_allow_resize();
-
-	/* We must copy the flattend device tree from init memory to regular
-	 * memory because the device tree references the strings in it
-	 * directly.
-	 */
-
-	alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE));
-
-	memcpy(alloc, initial_boot_params, initial_boot_params->totalsize);
-
-	initial_boot_params = alloc;
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index 719c5c8..09a769b 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -283,7 +283,7 @@ void __init setup_arch(char **cmdline_p)
 {
 	unsigned long max_low_pfn;
 
-	unflatten_device_tree();
+	unflatten_and_copy_device_tree();
 
 	setup_cpuinfo();
 
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