From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 17 Sep 2015 16:24:32 +0000 (-0400)
Subject: relay: use urcu_ref_get_unless_zero
X-Git-Tag: v2.11.0-rc1~569
X-Git-Url: https://git.lttng.org/?a=commitdiff_plain;h=ce4d40839ac3beef1a58730d3636a522497bc60f;hp=ce4d40839ac3beef1a58730d3636a522497bc60f;p=lttng-tools.git

relay: use urcu_ref_get_unless_zero

This allows removing the reflock be performing this check and increment
atomically.

The minimum version of userspace-rcu is bumped to 0.9.0 as
urcu_ref_get_unless_zero() was introduced as part of that
release.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---