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Subject[RFC PATCH 12/12] memory-hotplug : remove sysfs file of node
The patch adds node_set_offline() and unregister_one_node() to remove_memory()
for removing sysfs file of node.

CC: Len Brown <len.brown@intel.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Christoph Lameter <cl@linux.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

---
mm/memory_hotplug.c | 5 +++++
1 file changed, 5 insertions(+)
Index: linux-3.5-rc4/mm/memory_hotplug.c
===================================================================
--- linux-3.5-rc4.orig/mm/memory_hotplug.c 2012-06-26 14:32:03.630368866 +0900
+++ linux-3.5-rc4/mm/memory_hotplug.c 2012-06-26 14:39:58.090437374 +0900
@@ -702,6 +702,11 @@ int remove_memory(int nid, u64 start, u6
/* remove memmap entry */
firmware_map_remove(start, start + size, "System RAM");

+ if (!node_present_pages(nid)) {
+ node_set_offline(nid);
+ unregister_one_node(nid);
+ }
+
__remove_pages(start >> PAGE_SHIFT, size >> PAGE_SHIFT);
unlock_memory_hotplug();
return 0;


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