diff options
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-07-21 06:52:40 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-08-19 17:18:04 -0700
commit687d7a960aea46e016182c7ce346d62c4dbd0366 (patch)
parentf2e0dd7090eddef427ab9d9f81de122244cded51 (diff)
rcu: restrict TREE_RCU to SMP builds with !PREEMPT
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>
1 files changed, 1 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 2de5b1cbadd9..79ac52bef4ce 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -340,6 +340,7 @@ choice
config TREE_RCU
bool "Tree-based hierarchical RCU"
+ depends on !PREEMPT && SMP
This option selects the RCU implementation that is
designed for very large SMP system with hundreds or

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