From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Mon, 9 Feb 2009 19:05:19 +0000 (-0500)
Subject: Add comment in rcu_add_lock
X-Git-Tag: v0.1~299
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=3a9e6e9df706b8d39af94d2f027210e2e7d4106e;p=userspace-rcu.git

Add comment in rcu_add_lock

Comment optimization to make it clear to the reader.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
---

diff --git a/urcu.h b/urcu.h
index 9e9fea2..277b7d2 100644
--- a/urcu.h
+++ b/urcu.h
@@ -199,6 +199,7 @@ static inline void rcu_read_lock(void)
 	debug_yield_read();
 	tmp = urcu_active_readers;
 	debug_yield_read();
+	/* urcu_gp_ctr = RCU_GP_COUNT | (~RCU_GP_CTR_BIT or RCU_GP_CTR_BIT) */
 	if (likely(!(tmp & RCU_GP_CTR_NEST_MASK)))
 		urcu_active_readers = urcu_gp_ctr;
 	else