Subject: [RFC PATCH v5 19/19] memory-hotplug: remove sysfs file of node

From: Wen Congyang <[email-masked]>
Date: Fri, 27 Jul 2012 18:36:17 +0800

From: Yasuaki Ishimatsu <[email-masked]>

The patch adds node_set_offline() and unregister_one_node() to remove_memory()
for removing sysfs file of node.

CC: David Rientjes <[email-masked]>
CC: Jiang Liu <[email-masked]>
CC: Len Brown <[email-masked]>
CC: Benjamin Herrenschmidt <[email-masked]>
CC: Paul Mackerras <[email-masked]>
CC: Christoph Lameter <[email-masked]>
Cc: Minchan Kim <[email-masked]>
CC: Andrew Morton <[email-masked]>
CC: KOSAKI Motohiro <[email-masked]>
CC: Wen Congyang <[email-masked]>
Signed-off-by: Yasuaki Ishimatsu <[email-masked]>
---
 mm/memory_hotplug.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 5ac035f..5681968 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1267,6 +1267,11 @@ int __ref remove_memory(int nid, u64 start, u64 size)
 	/* remove memmap entry */
 	firmware_map_remove(start, start + size, "System RAM");
 
+	if (!node_present_pages(nid)) {
+		node_set_offline(nid);
+		unregister_one_node(nid);
+	}
+
 	arch_remove_memory(start, size);
 out:
 	unlock_memory_hotplug();
-- 
1.7.1