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kobject_add failed for vcs1 with -EEXIST

Subject: kobject_add failed for vcs1 with -EEXIST
From: Martin Michlmayr <>
Date: Fri, 24 Aug 2007 18:20:44 +0200
Original-recipient: rfc822;
User-agent: Mutt/1.5.13 (2006-08-11)
I just booted a current git kernel on a Fulong mini-PC and saw the
following in dmesg:

VFS: Mounted root (ext3 filesystem) readonly.
Freeing unused kernel memory: 128k freed
kobject_add failed for vcs1 with -EEXIST, don't try to register things with the
same name in the same directory.
Call Trace:
[<80108470>] dump_stack+0x8/0x34
[<80233f10>] kobject_shadow_add+0x190/0x1e0
[<80298c70>] device_add+0xdc/0x6fc
[<80299908>] device_create+0x94/0x11c
[<8027fea4>] vcs_make_sysfs+0x44/0x84
[<80288a14>] con_open+0xa4/0xc4
[<80277658>] tty_open+0x17c/0x350
[<80187478>] chrdev_open+0xb4/0x214
[<8018163c>] __dentry_open+0xec/0x31c
[<8018194c>] nameidata_to_filp+0x4c/0x64
[<801819c4>] do_filp_open+0x60/0x7c
[<80181a4c>] do_sys_open+0x6c/0x120
[<8010af04>] stack_done+0x20/0x3c

and the same for vcsa1.

Any idea what this means?
Martin Michlmayr

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