From a0832824822168774ba9649b8bdb383daf5f8a36 Mon Sep 17 00:00:00 2001
From: lorneli <lorneli@163.com>
Date: Wed, 2 May 2018 22:02:45 +0800
Subject: [PATCH] raft: describe the purpose of lockedRand

Struct lockedRand wraps rand.Rand with mutex lock because it's
accessed by multiple raft groups.
---
 raft/raft.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/raft/raft.go b/raft/raft.go
index 92857beb1..9a2d52b98 100644
--- a/raft/raft.go
+++ b/raft/raft.go
@@ -72,8 +72,8 @@ const (
 var ErrProposalDropped = errors.New("raft proposal dropped")
 
 // lockedRand is a small wrapper around rand.Rand to provide
-// synchronization. Only the methods needed by the code are exposed
-// (e.g. Intn).
+// synchronization among multiple raft groups. Only the methods needed
+// by the code are exposed (e.g. Intn).
 type lockedRand struct {
 	mu   sync.Mutex
 	rand *rand.Rand