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Fix: uatomic arm32: add missing release barrier before uatomic_xchg
authorMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mon, 5 Dec 2016 14:35:34 +0000 (09:35 -0500)
committerMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mon, 5 Dec 2016 14:36:38 +0000 (09:36 -0500)
__sync_lock_test_and_set() only imply a release barrier, but
uatomic_xchg() guarantees both acquire and release barrier semantics.
Therefore, add the missing release barrier.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

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