On Fri, Oct 19, 2012 at 2:46 AM,  [off-list ref] wrote:

From: Yasuaki Ishimatsu <redacted>

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."

The reason is node's device struct does not have a release() function.

So the patch registers node_device_release() to the device's release()
function for suppressing the warning message. Additionally, the patch adds
memset() to initialize a node struct into register_node(). Because the node
struct is part of node_devices[] array and it cannot be freed by
node_device_release(). So if system reuses the node struct, it has a garbage.

CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <redacted>
Cc: Minchan Kim <redacted>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <redacted>
Signed-off-by: Yasuaki Ishimatsu <redacted>
Signed-off-by: Wen Congyang <redacted>

I still think node array should be converted node pointer array and
node_device_release() free memory as other typical drivers.
However, this is acceptable as first step.

Acked-by: KOSAKI Motohiro <redacted>

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