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authorLi Zefan <lizefan@huawei.com>2012-06-06 19:12:30 -0700
committerTejun Heo <tj@kernel.org>2012-06-06 19:12:30 -0700
commit6be96a5c905178637ec06a5d456a76b2b304fca3 (patch)
tree06cc22397df498c7e4dbb7195f77d1bc587295e3 /Documentation/blockdev
parent967db0ea65b0bf8507a7643ac8f296c4f2c0a834 (diff)
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cgroup: remove hierarchy_mutex
It was introduced for memcg to iterate cgroup hierarchy without holding cgroup_mutex, but soon after that it was replaced with a lockless way in memcg. No one used hierarchy_mutex since that, so remove it. Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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