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rcu: restrict TREE_RCU to SMP builds with !PREEMPT

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Because both TINY_RCU and TREE_PREEMPT_RCU have been in mainline for
several releases, it is time to restrict the use of TREE_RCU to SMP
non-preemptible systems.  This reduces testing/validation effort.  This
commit is a first step towards driving the selection of RCU implementation
directly off of the SMP and PREEMPT configuration parameters.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2010-07-21 06:52:40 -07:00
parent f2e0dd7090
commit 687d7a960a
1 changed files with 1 additions and 0 deletions
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init/Kconfig
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@ -340,6 +340,7 @@ choice
config TREE_RCU config TREE_RCU
bool "Tree-based hierarchical RCU" bool "Tree-based hierarchical RCU"
depends on !PREEMPT && SMP
help help
This option selects the RCU implementation that is This option selects the RCU implementation that is
designed for very large SMP system with hundreds or designed for very large SMP system with hundreds or