rcu: Permit RCU_FAST_NO_HZ to be used by TREE_PREEMPT_RCU

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>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 43298f9810fb..82b6a4c675b2 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.