From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx169.postini.com [74.125.245.169]) by kanga.kvack.org (Postfix) with SMTP id D5FB16B005D for ; Fri, 19 Oct 2012 02:41:08 -0400 (EDT) From: wency@cn.fujitsu.com Subject: [PATCH v3 2/9] suppress "Device nodeX does not have a release() function" warning Date: Fri, 19 Oct 2012 14:46:35 +0800 Message-Id: <1350629202-9664-3-git-send-email-wency@cn.fujitsu.com> In-Reply-To: <1350629202-9664-1-git-send-email-wency@cn.fujitsu.com> References: <1350629202-9664-1-git-send-email-wency@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: rientjes@google.com, liuj97@gmail.com, len.brown@intel.com, benh@kernel.crashing.org, paulus@samba.org, minchan.kim@gmail.com, akpm@linux-foundation.org, kosaki.motohiro@jp.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com, Wen Congyang From: Yasuaki Ishimatsu 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 CC: Jiang Liu Cc: Minchan Kim CC: Andrew Morton CC: KOSAKI Motohiro Signed-off-by: Yasuaki Ishimatsu Signed-off-by: Wen Congyang --- drivers/base/node.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index af1a177..2baa73a 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -252,6 +252,9 @@ 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) +{ +} /* * register_node - Setup a sysfs device for a node. @@ -263,8 +266,11 @@ int register_node(struct node *node, int num, struct node *parent) { int error; + memset(node, 0, sizeof(*node)); + node->dev.id = num; node->dev.bus = &node_subsys; + node->dev.release = node_device_release; error = device_register(&node->dev); if (!error){ -- 1.7.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org