Commit-ID: 4a90a0681cf6cd21cd444184302aa045156486b3
Gitweb: http://git.kernel.org/tip/4a90a0681cf6cd21cd444184302aa045156486b3
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Wed, 14 Apr 2010 16:48:11 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 10 May 2010 11:08:35 -0700
rcu: permit discontiguous cpu_possible_mask CPU numbering
TREE_RCU assumes that CPU numbering is contiguous, but some users need
large holes in the numbering to better map to hardware layout. This patch
makes TREE_RCU (and TREE_PREEMPT_RCU) tolerate large holes in the CPU
numbering. However, NR_CPUS must still be greater than the largest
CPU number.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcutree.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index f391886..c60fd74 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1913,7 +1913,7 @@ static void __init rcu_init_one(struct rcu_state *rsp)
rnp = rsp->level[NUM_RCU_LVLS - 1];
for_each_possible_cpu(i) {
- if (i > rnp->grphi)
+ while (i > rnp->grphi)
rnp++;
rsp->rda[i]->mynode = rnp;
rcu_boot_init_percpu_data(i, rsp);
--
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