linux-kernel - Re: [PATCH] sysfs: Take sysfs_mutex when fetching the root inode.

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Message-ID: <4979637E.4070706@kernel.org>
Date:	Fri, 23 Jan 2009 15:28:14 +0900
From:	Tejun Heo <tj@...nel.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Greg Kroah-Hartman <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	Al Viro <viro@...IV.linux.org.uk>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sysfs: Take sysfs_mutex when fetching the root inode.

Eric W. Biederman wrote:
> sysfs_get_inode ultimately calls sysfs_count_nlink when the a
> directory inode is fectched.  sysfs_count_nlink needs to be
> called under the sysfs_mutex to guard against the unlikely
> but possible scenario that the root directory is changing
> as we are counting the number entries in it, and just in
> general to be consistent.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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