netdev - [BRIDGE] warning message when add an interface to bridge

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Message-ID: <3f696b20712041844h7c049b71reda92edd7b8cb16e@mail.gmail.com>
Date:	Wed, 5 Dec 2007 10:44:17 +0800
From:	"Chung-Chi Lo" <linolo@...il.com>
To:	netdev@...r.kernel.org
Subject: [BRIDGE] warning message when add an interface to bridge

My kernel is Linxu 2.6.22.1. SYSFS is off.
When adding an interface to bridge, console will show WARNING message.
If turn SYSFS to on, then the WARNING message is gone.
Any suggestion how to debug this problem? Thanks.

# ifconfig eth0 0.0.0.0
eth0: starting interface.
# brctl addbr br0
# brctl addif br0 eth0
WARNING: at lib/kref.c:33 kref_get()
Call Trace:
[<80027844>] dump_stack+0x8/0x38
[<8011f348>] kref_get+0xdc/0xe4
[<8011ee20>] kobject_get+0x20/0x34
[<8011e910>] kobject_shadow_add+0x5c/0x170
[<8011ea34>] kobject_add+0x10/0x20
[<8020aac0>] br_add_if+0xb4/0x1b4
[<8020b354>] add_del_if+0x5c/0x118
[<8020bcc4>] br_dev_ioctl+0x6c/0x88
[<80182edc>] dev_ifsioc+0x334/0x3c0
[<80183184>] dev_ioctl+0x21c/0x2ec
[<8016f76c>] sock_ioctl+0x130/0x2e4
[<800b3b2c>] do_ioctl+0x6c/0x84
[<800b3d40>] vfs_ioctl+0x80/0x248
[<800b3f58>] sys_ioctl+0x50/0x98
[<8002a8a8>] stack_done+0x20/0x3c
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