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SubjectRe: [PATCH tip/core/rcu 11/12] rcu: Make RCU able to tolerate undefined CONFIG_RCU_FANOUT_LEAF
On Tue, Apr 21, 2015 at 3:55 PM, Paul E. McKenney
<paulmck@linux.vnet.ibm.com> wrote:

> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index 2e52502bfc95..a2f64e4fdb57 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/rcu/tree_plugin.h
> @@ -86,10 +86,10 @@ static void __init rcu_bootup_announce_oddness(void)
> pr_info("\tAdditional per-CPU info printed with stalls.\n");
> if (RCU_NUM_LVLS >= 4)
> pr_info("\tFour(or more)-level hierarchy is enabled.\n");
> - if (CONFIG_RCU_FANOUT_LEAF != 16)
> + if (RCU_FANOUT_LEAF != 16)

So if CONFIG_RCU_FANOUT_LEAF is either by default 32 or 64, this check
against 16 for build-time adjustment is a bit misleading, no?

--
Pranith


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