cgroup/cpuset: Fix violation of cpuset locking rule
[ Upstream commit 6ba34d3c ] The cpuset fields that manage partition root state do not strictly follow the cpuset locking rule that update to cpuset has to be done with both the callback_lock and cpuset_mutex held. This is now fixed by making sure that the locking rule is upheld. Fixes: 3881b861 ("cpuset: Add an error state to cpuset.sched.partition") Fixes: 4b842da2 ("cpuset: Make CPU hotplug work with partition") Signed-off-by:Waiman Long <longman@redhat.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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