[PATCH 2/6] add smprwlock implementation based on phase-fairness lock

[Sebastian Huber]

Hello Wei,

the general SMP rwlock API is all right.  Please add some documentation.  It 
should cover the fairness properties of the phase-fair lock implementation. 
Please add also literature references.

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
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