[PATCH 1/2] mm/page_alloc.c: Implement an empty get_pfn_range_for_nid

[Zhang Yanfei]

From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>

Implement an empty get_pfn_range_for_nid for !CONFIG_HAVE_MEMBLOCK_NODE_MAP,
so that we could remove the #ifdef in free_area_init_node.

Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
---
 mm/page_alloc.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index dd886fa..1fb13b6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4566,6 +4566,11 @@ static unsigned long __meminit zone_absent_pages_in_node(int nid,
 }
 
 #else /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+void __meminit get_pfn_range_for_nid(unsigned int nid,
+			unsigned long *ignored, unsigned long *ignored)
+{
+}
+
 static inline unsigned long __meminit zone_spanned_pages_in_node(int nid,
 					unsigned long zone_type,
 					unsigned long node_start_pfn,
@@ -4871,9 +4876,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
 	pgdat->node_id = nid;
 	pgdat->node_start_pfn = node_start_pfn;
 	init_zone_allows_reclaim(nid);
-#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
 	get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
-#endif
 	calculate_node_totalpages(pgdat, start_pfn, end_pfn,
 				  zones_size, zholes_size);
 
-- 
1.7.1
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