From: David Rientjes <rientjes@google.com>
To: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
liuj97@gmail.com, minchan.kim@gmail.com,
akpm@linux-foundation.org, kosaki.motohiro@jp.fujitsu.com,
wency@cn.fujitsu.com
Subject: Re: [PATCH 2/2]suppress "Device nodeX does not have a release() function" warning
Date: Thu, 11 Oct 2012 13:31:58 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1210111326000.28062@chino.kir.corp.google.com> (raw)
In-Reply-To: <50765896.4000300@jp.fujitsu.com>
On Thu, 11 Oct 2012, Yasuaki Ishimatsu wrote:
> 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.
>
Nice catch on reuse of the statically allocated node_devices[] for node
hotplug.
> CC: David Rientjes <rientjes@google.com>
> CC: Jiang Liu <liuj97@gmail.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>
> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Can register_node() be made static in drivers/base/node.c and its
declaration removed from linux/node.h?
Acked-by: David Rientjes <rientjes@google.com>
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next prev parent reply other threads:[~2012-10-11 20:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-11 5:19 [PATCH v2 0/2] Suppress "Device <device name> " Yasuaki Ishimatsu
2012-10-11 5:22 ` [PATCH 1/2]suppress "Device memoryX " Yasuaki Ishimatsu
2012-10-11 20:23 ` David Rientjes
2012-10-11 22:30 ` KOSAKI Motohiro
2012-10-11 5:26 ` [PATCH 2/2]suppress "Device nodeX " Yasuaki Ishimatsu
2012-10-11 20:31 ` David Rientjes [this message]
2012-10-12 0:13 ` Yasuaki Ishimatsu
2012-10-11 22:33 ` KOSAKI Motohiro
2012-10-17 6:24 ` Wen Congyang
2012-10-17 8:50 ` KOSAKI Motohiro
2012-10-19 5:42 ` Wen Congyang
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