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

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Message-id: <200801101127.31961.yinghai.lu@sun.com>
Date:	Thu, 10 Jan 2008 11:27:31 -0800
From:	Yinghai Lu <Yinghai.Lu@....COM>
To:	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86_64: cleanup setup_node_zones called by paging_init v4

please check the one against to x86.git mm

[PATCH] x86_64: cleanup setup_node_zones called by paging_init v4

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@....com>

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 8482314..551e359 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);
 }
--
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