From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 5 Dec 2016 14:35:34 +0000 (-0500)
Subject: Fix: uatomic arm32: add missing release barrier before uatomic_xchg
X-Git-Tag: v0.9.4~2
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=a4850cc6c0eb0a7a61086eca3076c2ea378ef65c;hp=a4850cc6c0eb0a7a61086eca3076c2ea378ef65c;p=userspace-rcu.git

Fix: uatomic arm32: add missing release barrier before uatomic_xchg

__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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