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[tip/core/rcu,1/9] rcu: Permit RCU_FAST_NO_HZ to be used by TREE_PREEMPT_RCU

Message ID 1321388885-11211-1-git-send-email-paulmck@linux.vnet.ibm.com
State Accepted
Commit b807fbff3102bcac76ed9157d834dc20bb3d133b
Headers show

Commit Message

Paul E. McKenney Nov. 15, 2011, 8:27 p.m. UTC 
From: Paul E. McKenney <paul.mckenney@linaro.org>

The new implementation of RCU_FAST_NO_HZ is compatible with preemptible
RCU, so this commit removes the Kconfig restriction that previously
prohibited this.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
 init/Kconfig |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)
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Patch

diff --git a/init/Kconfig b/init/Kconfig
index 43298f9..82b6a4c 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -469,14 +469,14 @@  config RCU_FANOUT_EXACT
 
 config RCU_FAST_NO_HZ
 	bool "Accelerate last non-dyntick-idle CPU's grace periods"
-	depends on TREE_RCU && NO_HZ && SMP
+	depends on NO_HZ && SMP
 	default n
 	help
 	  This option causes RCU to attempt to accelerate grace periods
-	  in order to allow the final CPU to enter dynticks-idle state
-	  more quickly.  On the other hand, this option increases the
-	  overhead of the dynticks-idle checking, particularly on systems
-	  with large numbers of CPUs.
+	  in order to allow CPUs to enter dynticks-idle state more
+	  quickly.  On the other hand, this option increases the overhead
+	  of the dynticks-idle checking, particularly on systems with
+	  large numbers of CPUs.
 
 	  Say Y if energy efficiency is critically important, particularly
 	  	if you have relatively few CPUs.