linux-kernel - [patch -mm] memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap fix fix fix fix fix

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Date:	Thu, 21 Feb 2013 13:18:07 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Lin Feng <linfeng@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	mhocko@...e.cz, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Wen Congyang <wency@...fujitsu.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Tang Chen <tangchen@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>
Subject: [patch -mm] memory-hotplug: implement register_page_bootmem_info_section
 of sparse-vmemmap fix fix fix fix fix

Fixes

mm/memory_hotplug.c:133:13: warning: 'register_page_bootmem_info_section' defined but not used [-Wunused-function]

by defining the function only in configurations where it is used.

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 mm/memory_hotplug.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -129,6 +129,7 @@ void __ref put_page_bootmem(struct page *page)
 
 }
 
+#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
 #ifndef CONFIG_SPARSEMEM_VMEMMAP
 static void register_page_bootmem_info_section(unsigned long start_pfn)
 {
@@ -163,7 +164,7 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
 		get_page_bootmem(section_nr, page, MIX_SECTION_INFO);
 
 }
-#else
+#else /* CONFIG_SPARSEMEM_VMEMMAP */
 static void register_page_bootmem_info_section(unsigned long start_pfn)
 {
 	unsigned long *usemap, mapsize, section_nr, i;
@@ -188,9 +189,8 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
 	for (i = 0; i < mapsize; i++, page++)
 		get_page_bootmem(section_nr, page, MIX_SECTION_INFO);
 }
-#endif
+#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
 
-#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
 void register_page_bootmem_info_node(struct pglist_data *pgdat)
 {
 	unsigned long i, pfn, end_pfn, nr_pages;
@@ -232,7 +232,7 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat)
 			register_page_bootmem_info_section(pfn);
 	}
 }
-#endif
+#endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */
 
 static void grow_zone_span(struct zone *zone, unsigned long start_pfn,
 			   unsigned long end_pfn)
--
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