linux-kernel - [patch -mm] memory-hotplug: export the function try_offline

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Date:	Thu, 24 Jan 2013 15:05:24 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Tang Chen <tangchen@...fujitsu.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Wen Congyang <wency@...fujitsu.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [patch -mm] memory-hotplug: export the function try_offline_node()
 fix

"memory-hotplug: export the function try_offline_node()" declares 
try_offline_node() for CONFIG_MEMORY_HOTPLUG, but this function is only 
defined for CONFIG_MEMORY_HOTREMOVE:

ERROR: "try_offline_node" [drivers/acpi/processor.ko] undefined!

Fix the build by definining it appropriately.

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 extensively trimmed the cc list of the email to only the maintainers
 from scripts/get_maintainer.pl.

 include/linux/memory_hotplug.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -193,7 +193,6 @@ extern void get_page_bootmem(unsigned long ingo, struct page *page,
 
 void lock_memory_hotplug(void);
 void unlock_memory_hotplug(void);
-extern void try_offline_node(int nid);
 
 #else /* ! CONFIG_MEMORY_HOTPLUG */
 /*
@@ -228,13 +227,13 @@ static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
 
 static inline void lock_memory_hotplug(void) {}
 static inline void unlock_memory_hotplug(void) {}
-static inline void try_offline_node(int nid) {}
 
 #endif /* ! CONFIG_MEMORY_HOTPLUG */
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
 
 extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages);
+extern void try_offline_node(int nid);
 
 #else
 static inline int is_mem_section_removable(unsigned long pfn,
@@ -242,6 +241,8 @@ static inline int is_mem_section_removable(unsigned long pfn,
 {
 	return 0;
 }
+
+static inline void try_offline_node(int nid) {}
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 
 extern int mem_online_node(int nid);
--
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