score: fixed pfn_valid define.

Signed-off-by: Cui Bixiong <bixiong@sunnorth.com.cn>
Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>

	modified:   arch/score/include/asm/page.h
	modified:   arch/score/kernel/setup.c
	modified:   arch/score/mm/init.c

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
index 6a2503c75c4e..6f898c057878 100644
--- a/arch/score/kernel/setup.c
+++ b/arch/score/kernel/setup.c
@@ -49,6 +49,7 @@ static void __init bootmem_init(void)
 
         min_low_pfn = PFN_UP(MEMORY_START);
         max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
+        max_mapnr = max_low_pfn - min_low_pfn;
 
         /* Initialize the boot-time allocator with low memory only. */
         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,