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

[Peter Zijlstra]

On Wed, 2010-01-13 at 19:09 -0800, Eric W. Biederman wrote:
> 
> I agree weird.  Either you don't have my patch working correctly or I
> talk a good good game but I don't have a clue about lockdep
> subclasses.

Subclasses and classes are basically the same thing, except that
subclasses are an 'easy' way to modify the regular class of an object.

Subclasses are limited to 7, 0 (the regular class), 1-7 subclasses.

Subclasses (just like regular classes) have no intrinsic ordering, their
order is given by the lock hierarchy.

Anything else you want to know?

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