[PATCH] powerpc/prom: move the device tree if not in declared memory.

[Christophe Leroy]

If the device tree doesn't reside in the memory which is declared
inside it, it has to be moved as well as this memory will not be
mapped by the kernel.

Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>
---
 arch/powerpc/kernel/prom.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 87a68e2dc531..4181ec715f88 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -124,8 +124,8 @@ static void __init move_device_tree(void)
 	size = fdt_totalsize(initial_boot_params);
 
 	if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) ||
-			overlaps_crashkernel(start, size) ||
-			overlaps_initrd(start, size)) {
+	    !memblock_is_memory(start + size - 1) ||
+	    overlaps_crashkernel(start, size) || overlaps_initrd(start, size)) {
 		p = __va(memblock_phys_alloc(size, PAGE_SIZE));
 		memcpy(p, initial_boot_params, size);
 		initial_boot_params = p;
-- 
2.13.3