* Josef Bacik <jba...@fusionio.com> wrote:
> Btrfs needs a simple way to know if it needs to let go of it's read lock on a
> rwsem. Introduce rwsem_is_contended to check to see if there are any waiters
> on
> this rwsem currently. This is just a hueristic, it is meant to be light and
> not
> 100% accurate and called by somebody already holding on to the rwsem in either
> read or write. Thanks,
>
> Signed-off-by: Josef Bacik <jba...@fusionio.com>
Acked-by: Ingo Molnar <mi...@kernel.org>
Thanks,
Ingo
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