linux-kernel - [PATCH 04/20] mips: ralink: convert to use unflatten_and_copy_device

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Date:	Thu,  3 Apr 2014 17:16:47 -0500
From:	Rob Herring <robherring2@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org
Subject: [PATCH 04/20] mips: ralink: convert to use unflatten_and_copy_device_tree

From: Rob Herring <robh@...nel.org>

The ralink FDT code can be simplified by using
unflatten_and_copy_device_tree function. This removes all accesses to
FDT header data by the arch code.

Signed-off-by: Rob Herring <robh@...nel.org>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: linux-mips@...ux-mips.org
---
 arch/mips/ralink/of.c | 25 +------------------------
 1 file changed, 1 insertion(+), 24 deletions(-)

diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
index eccc552..0170d82 100644
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -52,30 +52,7 @@ __iomem void *plat_of_remap_node(const char *node)
 
 void __init device_tree_init(void)
 {
-	unsigned long base, size;
-	void *fdt_copy;
-
-	if (!initial_boot_params)
-		return;
-
-	base = virt_to_phys((void *)initial_boot_params);
-	size = be32_to_cpu(initial_boot_params->totalsize);
-
-	/* Before we do anything, lets reserve the dt blob */
-	reserve_bootmem(base, size, BOOTMEM_DEFAULT);
-
-	/* The strings in the flattened tree are referenced directly by the
-	 * device tree, so copy the flattened device tree from init memory
-	 * to regular memory.
-	 */
-	fdt_copy = alloc_bootmem(size);
-	memcpy(fdt_copy, initial_boot_params, size);
-	initial_boot_params = fdt_copy;
-
-	unflatten_device_tree();
-
-	/* free the space reserved for the dt blob */
-	free_bootmem(base, size);
+	unflatten_and_copy_device_tree();
 }
 
 void __init plat_mem_setup(void)
-- 
1.8.3.2

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