From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753410Ab3LJNcZ (ORCPT ); Tue, 10 Dec 2013 08:32:25 -0500 Received: from cantor2.suse.de ([195.135.220.15]:40126 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751905Ab3LJNcX (ORCPT ); Tue, 10 Dec 2013 08:32:23 -0500 Message-ID: <52A717E2.6040907@suse.cz> Date: Tue, 10 Dec 2013 14:32:18 +0100 From: Vlastimil Babka User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 MIME-Version: 1.0 To: Tejun Heo , Yuanhan Liu Cc: Fengguang Wu , Greg Kroah-Hartman , linux-kernel@vger.kernel.org Subject: Re: BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:20 References: <20131205031051.GC5135@yliu-dev.sh.intel.com> <20131205225019.GA32005@mtj.dyndns.org> In-Reply-To: <20131205225019.GA32005@mtj.dyndns.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/05/2013 11:50 PM, Tejun Heo wrote: > On Thu, Dec 05, 2013 at 11:10:51AM +0800, Yuanhan Liu wrote: >> Greetings, >> >> I got the below dmesg and the first bad commit is >> >> commit 4b93dc9b1c684d0587fe44d36bbfdf45bd3bea9d >> Author: Tejun Heo >> AuthorDate: Thu Nov 28 14:54:43 2013 -0500 >> Commit: Greg Kroah-Hartman >> CommitDate: Fri Nov 29 18:16:08 2013 -0800 >> >> sysfs, kernfs: prepare mount path for kernfs > > Oops, can you please try the following patch? > > Thanks. > > diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c > index e7e3aa8..8d07527 100644 > --- a/fs/sysfs/mount.c > +++ b/fs/sysfs/mount.c > @@ -45,8 +45,10 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type, > > static void sysfs_kill_sb(struct super_block *sb) > { > + void *ns = (void *)kernfs_super_ns(sb); > + > kernfs_kill_sb(sb); > - kobj_ns_drop(KOBJ_NS_TYPE_NET, (void *)kernfs_super_ns(sb)); > + kobj_ns_drop(KOBJ_NS_TYPE_NET, ns); > } > > static struct file_system_type sysfs_fs_type = { I've had the same problem with linux-next-20131209 and this patch fixed it. Feel free to add if appropriate: Tested-by: Vlastimil Babka > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >