tree 707a766a52a076597bccf355043629fb4a498d83
parent 8e575044b6aec2d47045c14ac429c66a348204e0
author Paul E. McKenney <paul.mckenney@linaro.org> 1352593699 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1352846606 -0800

rcu: Provide compile-time control for no-CBs CPUs

Currently, the only way to specify no-CBs CPUs is via the rcu_nocbs
kernel command-line parameter.  This is inconvenient in some cases,
particularly for randconfig testing, so this commit adds a new
RCU_NOCB_CPU_DEFAULT kernel configuration parameter.  Setting this
new parameter to zero (the default) retains the old behavior, setting
it to one offloads callback processing from CPU 0 (along with any
other CPUs specified by the rcu_nocbs boot-time parameter), and setting
it to two offloads callback processing from all CPUs.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>