locking/qspinlock: Refactor the qspinlock slow path
Move some of the code manipulating the spin lock into separate functions. This would allow easier integration of alternative ways to manipulate that lock. Signed-off-by: Alex Kogan <alex.kogan@oracle.com> Reviewed-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Waiman Long <longman@redhat.com>
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