x86: cleanup setup_node_zones called by paging_init()

setup_node_zones() calcuates some variables but only use them when
FLAT_NODE_MEM_MAP is set

so change the MACRO postion to avoid calculating.

also change it to static, and rename it to flat_setup_node_zones().

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 848231481619..551e3590e5c5 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -233,8 +233,9 @@ void __init setup_node_bootmem(int nodeid, unsigned long start,
         node_set_online(nodeid);
 }
 
+#ifdef CONFIG_FLAT_NODE_MEM_MAP
 /* Initialize final allocator for a zone */
-void __init setup_node_zones(int nodeid)
+static void __init flat_setup_node_zones(int nodeid)
 {
         unsigned long start_pfn, end_pfn, memmapsize, limit;
 
@@ -250,14 +251,16 @@ void __init setup_node_zones(int nodeid)
          */
         memmapsize = sizeof(struct page) * (end_pfn-start_pfn);
         limit = end_pfn << PAGE_SHIFT;
-#ifdef CONFIG_FLAT_NODE_MEM_MAP
+
         NODE_DATA(nodeid)->node_mem_map =
                 __alloc_bootmem_core(NODE_DATA(nodeid)->bdata,
                                      memmapsize, SMP_CACHE_BYTES,
                                      round_down(limit - memmapsize, PAGE_SIZE),
                                      limit);
-#endif
 }
+#else
+#define flat_setup_node_zones(i) do {} while (0)
+#endif
 
 /*
  * There are unfortunately some poorly designed mainboards around that
@@ -581,7 +584,7 @@ void __init paging_init(void)
         sparse_init();
 
         for_each_online_node(i)
-                setup_node_zones(i);
+                flat_setup_node_zones(i);
 
         free_area_init_nodes(max_zone_pfns);
 }