Re: [Patch 0/2] sysfs: fix s_active lockdep warning

From: Greg KH
Date: Fri Jan 29 2010 - 13:11:36 EST


On Fri, Jan 29, 2010 at 06:57:28PM +0100, Peter Zijlstra wrote:
> On Fri, 2010-01-29 at 06:22 -0800, Greg KH wrote:
> >
> > Heh, this whole mess is the very reason we didn't add lockdep support to
> > the driver core. Nested devices that all look alike from the driver
> > core, are really different objects and the locking lifetimes are
> > separate, but lockdep can't see that.
>
> And here I through Alan Stern had a handle on making the driver core
> play nice.

It's not the driver core that is the issue here, it's that lockdep can't
handle the tree structure of devices that is represented in the kernel.

I don't think it is a driver core problem, but rather, a lockdep issue.

thanks,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/