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SubjectRe: [PATCH 2/4] memory-hotplug: add node_device_release
On 09/27/2012 01:45 PM, wency@cn.fujitsu.com wrote:
> From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
>
> 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()
looks reasonable to me.
>
> 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: 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>
> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
> ---
> drivers/base/node.c | 11 +++++++++++
> 1 files changed, 11 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/base/node.c b/drivers/base/node.c
> index af1a177..07523fb 100644
> --- a/drivers/base/node.c
> +++ b/drivers/base/node.c
> @@ -252,6 +252,16 @@ static inline void hugetlb_register_node(struct node *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);
> +
> +#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
> + flush_work(&node_dev->node_work);
> +#endif
> +
> + memset(node_dev, 0, sizeof(struct node));
> +}
>
> /*
> * register_node - Setup a sysfs device for a node.
> @@ -265,6 +275,7 @@ int register_node(struct node *node, int num, struct node *parent)
>
> node->dev.id = num;
> node->dev.bus = &node_subsys;
> + node->dev.release = node_device_release;
> error = device_register(&node->dev);
>
> if (!error){



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