Re: 2.6.33-rc3 -- INFO: possible recursive locking -- (s_active){++++.+},at: [<c10d2941>] sysfs_hash_and_remove+0x3d/0x4f

[Tejun Heo]

On 01/11/2010 11:26 AM, Eric W. Biederman wrote:
> From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
> Date: Sun, 10 Jan 2010 18:13:35 -0800
> Subject: [PATCH] sysfs: Add support for lockdep subclasses to s_active
> 
> We have apparently valid cases where the code for a sysfs attribute
> removes other sysfs attributes.  Without support for subclasses
> lockdep flags a possible recursive lock problem as it figures
> the first sysfs attribute could be attempting to remove itself.
> 
> By adding support for sysfs subclasses we can teach lockdep to
> distinguish between different types of sysfs attributes and not
> get confused.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

-- 
tejun
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