tree 12bec33a6fbcb8b4db4cd5f2938dd902f244070a
parent 33ad801dfb5c8b1127c72fdb745ce8c630150f3f
author Li Zefan <lizefan@huawei.com> 1370769322 +0800
committer Tejun Heo <tj@kernel.org> 1371145712 -0700

cpuset: introduce effective_{cpumask|nodemask}_cpuset()

effective_cpumask_cpuset() returns an ancestor cpuset which has
non-empty cpumask.

If a cpuset is empty and the tasks in it need to update their
cpus_allowed, they take on the ancestor cpuset's cpumask.

This currently won't change any behavior, but it will later allow us
to keep tasks in empty cpusets.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>