[RFC PATCH v2 12/13] memory-hotplug : add node_device_release

Yasuaki Ishimatsu
2012-07-03T06:05:30Z

When calling unregister_node(), the function shows following message at
device_release().

Device 'node2' does not have a release() function, it is broken and must be
fixed.

So the patch implements node_device_release()

CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <liuj97@gmail.com>
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>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

---
drivers/base/node.c | 7 +++++++
1 file changed, 7 insertions(+)

Index: linux-3.5-rc4/drivers/base/node.c
===================================================================
--- linux-3.5-rc4.orig/drivers/base/node.c 2012-07-03 14:21:44.882432167 +0900
+++ linux-3.5-rc4/drivers/base/node.c 2012-07-03 14:22:23.296951921 +0900
@@ -252,6 +252,12 @@ static inline void hugetlb_register_node
static inline void hugetlb_unregister_node(struct node *node) {}
#endif

+static void node_device_release(struct device *dev)
+{
+ struct node *node_dev = to_node(dev);
+
+ memset(node_dev, 0, sizeof(struct node));
+}

/*
* register_node - Setup a sysfs device for a node.
@@ -265,6 +271,7 @@ int register_node(struct node *node, int

node->dev.id = num;
node->dev.bus = &node_subsys;
+ node->dev.release = node_device_release;
error = device_register(&node->dev);

if (!error){