From: Li Zefan <lizefan@huawei.com>
Date: Wed, 9 Jul 2014 08:48:32 +0000 (+0800)
Subject: cpuset: apply cs->effective_{cpus,mems}
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~190^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae1c802382f7af60aa54879fb4f5920a9df1ff48;p=pandora-kernel.git

cpuset: apply cs->effective_{cpus,mems}

Now we can use cs->effective_{cpus,mems} as effective masks. It's
used whenever:

- we update tasks' cpus_allowed/mems_allowed,
- we want to retrieve tasks_cs(tsk)'s cpus_allowed/mems_allowed.

They actually replace effective_{cpu,node}mask_cpuset().

effective_mask == configured_mask & parent effective_mask except when
the reault is empty, in which case it inherits parent effective_mask.
The result equals the mask computed from effective_{cpu,node}mask_cpuset().

This won't affect the original legacy hierarchy, because in this case we
make sure the effective masks are always the same with user-configured
masks.

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