tree f719feff0ea9d7d42b0015a4cd388e2f5b072a4b
parent 249cc86db7492dc8de1d2eddebc6bcc4ab2a8e9e
author Li Zefan <lizefan@huawei.com> 1370423759 +0800
committer Tejun Heo <tj@kernel.org> 1370465714 -0700

cpuset: re-structure update_cpumask() a bit

Check if cpus_allowed is to be changed before calling validate_change().

This won't change any behavior, but later it will allow us to do this:

 # mkdir /cpuset/child
 # echo $$ > /cpuset/child/tasks	/* empty cpuset */
 # echo > /cpuset/child/cpuset.cpus	/* do nothing, won't fail */

Without this patch, the last operation will fail.

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