On Fri, 25 Jan 2013, Paul Gortmaker wrote:
> From: Thomas Gleixner <[email protected]>
>
> There is no real reason to use a rwlock for devtree_lock. It even
> could be a mutex, but unfortunately it's locked from cpu hotplug
> paths which can't schedule :(
>
> So it needs to become a raw lock on rt as well. The devtree_lock would
> be the only user of a raw_rw_lock, so we are better off cleaning up the
> recursive locking paths which allows us to convert devtree_lock to a
> read_lock.
Hmm. It's already a rw_lock. For RT we want to change that thing to a
raw_spinlock.
Thanks,
tglx
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