linux-kernel - [PATCH] x86_64: cleanup setup_node_zones called by paging

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Date:	Tue, 08 Jan 2008 19:34:33 -0800
From:	Yinghai Lu <Yinghai.Lu@....COM>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Lameter <clameter@....com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86_64: cleanup setup_node_zones called by paging_init

[PATCH] x86_64: cleanup setup_node_zones called by paging_init

setup_node_zones calcuates some variable but only use them when FLAT_NODE_MEM_MAP is set

so change the MACRO postion to avoid calculating.

also change it to static

Signed-off-by: Yinghai Lu <yinghai.lu@....com>

Index: linux-2.6/arch/x86/mm/numa_64.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/numa_64.c
+++ linux-2.6/arch/x86/mm/numa_64.c
@@ -227,15 +227,16 @@ void __init setup_node_bootmem(int nodei
 	srat_reserve_add_area(nodeid);
 #endif
 	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 setup_node_zones(int nodeid)
+{
 	unsigned long start_pfn, end_pfn, memmapsize, limit;
 
- 	start_pfn = node_start_pfn(nodeid);
- 	end_pfn = node_end_pfn(nodeid);
+	start_pfn = node_start_pfn(nodeid);
+	end_pfn = node_end_pfn(nodeid);
 
 	Dprintk(KERN_INFO "Setting up memmap for node %d %lx-%lx\n",
 		nodeid, start_pfn, end_pfn);
@@ -244,14 +245,13 @@ void __init setup_node_zones(int nodeid)
 	   memory. */
 	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), 
+	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
-} 
 
 void __init numa_init_array(void)
 {
@@ -570,9 +570,11 @@ void __init paging_init(void)
 	sparse_memory_present_with_active_regions(MAX_NUMNODES);
 	sparse_init();
 
+#ifdef CONFIG_FLAT_NODE_MEM_MAP
 	for_each_online_node(i) {
-		setup_node_zones(i); 
+		setup_node_zones(i);
 	}
+#endif
 
 	free_area_init_nodes(max_zone_pfns);
 } 
--
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