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Make TREE_RCU be default (was CLASSIC_RCU).

From:  "Paul E. McKenney" <>
Subject:  [PATCH -tip] Make TREE_RCU be default (was CLASSIC_RCU).
Date:  Fri, 3 Apr 2009 17:27:21 -0700
Message-ID:  <12388048487-git-send-email->
Cc:,,,,,,,,,,,,,,,,, "Paul E. McKenney" <>
Archive-link:  Article

Given that there have been no TREE_RCU bugs reported for some months,
it is time to make TREE_RCU be the default RCU implementation.  The rest
of this series updates defconfig files that: (1) have CONFIG_SMP=y and
(2) explicitly mention CONFIG_CLASSIC_RCU.

Given that I don't have access to most of the relevant hardware, much
of this is untested.

Signed-off-by: Paul E. McKenney <>
 init/Kconfig |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 236a793..ef9d030 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -302,7 +302,7 @@ menu "RCU Subsystem"
 	prompt "RCU Implementation"
-	default CLASSIC_RCU
+	default TREE_RCU
 	bool "Classic RCU"

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