From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Mon, 1 Mar 2010 21:42:15 +0000 (-0500)
Subject: urcu: fix multiple register/unregister assertion failure
X-Git-Tag: v0.4.2~7
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=4b5be3bea6677b2f10ed15b3e726b77bf6e3d3d0;p=userspace-rcu.git

urcu: fix multiple register/unregister assertion failure

Caused by the fact that we check for the whole gp count (which includes the last
grace period phase bit) rather than just checking if the nesting count mask is
zero.

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

diff --git a/urcu.c b/urcu.c
index 5d09a62..b856755 100644
--- a/urcu.c
+++ b/urcu.c
@@ -346,7 +346,7 @@ void rcu_register_thread(void)
 {
 	rcu_reader.tid = pthread_self();
 	assert(rcu_reader.need_mb == 0);
-	assert(rcu_reader.ctr == 0);
+	assert(!(rcu_reader.ctr & RCU_GP_CTR_NEST_MASK));
 
 	mutex_lock(&rcu_gp_lock);
 	rcu_init();	/* In case gcc does not support constructor attribute */