tree 7d379f91321cec58b87fd5f5089947872689d591
parent e546f485e1d7520ca0200502cdcc11b503f4805c
author Lai Jiangshan <laijs@cn.fujitsu.com> 1277713504 +0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1282263481 -0700

rcu: simplify the usage of percpu data

&percpu_data is compatible with allocated percpu data.

And we use it and remove the "->rda[NR_CPUS]" array, saving significant
storage on systems with large numbers of CPUs.  This does add an additional
level of indirection and thus an additional cache line referenced, but
because ->rda is not used on the read side, this is OK.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Reviewed-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>