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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-11-17 18:25:48 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-17 15:32:48 -0800
commit2f33b512a5460578f6cf11d7b7867bed53157c7c (patch)
treebaa9491f327de99495174da0b6eb9be12b1d8b57 /kernel/rcu
parent6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 (diff)
downloadop-kernel-dev-2f33b512a5460578f6cf11d7b7867bed53157c7c.zip
op-kernel-dev-2f33b512a5460578f6cf11d7b7867bed53157c7c.tar.gz
rcu: Optimize rcu_is_nocb_cpu() for RCU_NOCB_CPU_ALL
If CONFIG_RCU_NOCB_CPU_ALL=y, then rcu_is_nocb_cpu() will always return true, however, the current version nevertheless checks rcu_nocb_mask. This commit therefore creates a static inline implementation of rcu_is_nocb_cpu() that unconditionally returns true when CONFIG_RCU_NOCB_CPU_ALL=y. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree_plugin.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 6e2ef4b..39a50b9 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2101,6 +2101,7 @@ static void rcu_init_one_nocb(struct rcu_node *rnp)
init_waitqueue_head(&rnp->nocb_gp_wq[1]);
}
+#ifndef CONFIG_RCU_NOCB_CPU_ALL
/* Is the specified CPU a no-CPUs CPU? */
bool rcu_is_nocb_cpu(int cpu)
{
@@ -2108,6 +2109,7 @@ bool rcu_is_nocb_cpu(int cpu)
return cpumask_test_cpu(cpu, rcu_nocb_mask);
return false;
}
+#endif /* #ifndef CONFIG_RCU_NOCB_CPU_ALL */
/*
* Enqueue the specified string of rcu_head structures onto the specified
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