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H A Dkern_rwlock.cdiff 157826 Mon Apr 17 21:11:01 MDT 2006 jhb - Add a rw_wowner() macro that just returns the owner of a write lock and
use it in places that only care about the write owner instead of
rw_owner() as a baby step towards limited read-lock owner.
- Tidy the code that sets the WAITER flag bits to not duplicate a test
around the atomic operation and the KTR trace in both of the lock
functions.

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