[Ocfs2-devel] [RFC][PATCH 0/3] configfs: Make nested default groups lockdep-friendly

[Joel Becker]

On Tue, May 20, 2008 at 03:35:43PM -0700, Arjan van de Ven wrote:
> not quite what I meant; what I meant is more like how sched.c deals
> with per cpu queues:
> 
> (from sched.c)
> 
>                 spin_lock_init(&rq->lock);
>                 lockdep_set_class(&rq->lock, &rq->rq_lock_key); 

	Looking at this, it's taking the address of the struct
lock_class_key as the actual key.  Thus, if we tie one of these guys to
the structure we're representing, we get lock safety...except that we're
talking about i_mutex here, and we want to interact with the VFS's use
thereof.

Joel

-- 

"There is no sincerer love than the love of food."  
         - George Bernard Shaw 

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127