tree 5e54587e0844d51f6c015f4c489cbf021c9db509
parent 4300aa642cc9ecb35f2e0683dd294fb790ef028c
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1271288891 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1273514915 -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@linux.vnet.ibm.com>