Paul E. McKenney 6016ffc387 atomics: Add header comment so spin_unlock_wait() ...

There is material describing the ordering guarantees provided by
spin_unlock_wait(), but it is not necessarily easy to find.  This commit
therefore adds a docbook header comment to this function informally
describing its semantics.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>

2017-06-08 08:25:29 -07:00

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