On Tue, May 26, 2015 at 11:42:11AM -0700, Davidlohr Bueso wrote:

> Instead of dropping percpu-rwsem, I was thinking we could instead look
> for opportunities to convert new users, for instance shinkers, where the
> write lock is also taken just for register and unregister purposes,
> similar to uprobes.

Another 'obvious' one would be the cpu hotplug lock. That's basically
the same locking primitive with just a wee little difference.

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