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| author |   Tejun Heo <tj@kernel.org> | 2013-08-08 20:11:24 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-08-08 20:11:24 -0400 |
| commit | 67f4c36f83455b253445b2cb28ac9a2c4f85d99a (patch) | |
| tree | 3c7aecc6fc830799cf36716ea64583cc10cb9d40 /net/sched/cls_cgroup.c | |
| parent | cgroup: pin cgroup_subsys_state when opening a cgroupfs file (diff) | |
| download | linux-dev-67f4c36f83455b253445b2cb28ac9a2c4f85d99a.tar.xz linux-dev-67f4c36f83455b253445b2cb28ac9a2c4f85d99a.zip | |
cgroup: add cgroup->dummy_css
cgroup subsystem API is being converted to use css
(cgroup_subsys_state) as the main handle, which makes things a bit
awkward for subsystem agnostic core features - the "cgroup.*"
interface files and various iterations - a bit awkward as they don't
have a css to use.
This patch adds cgroup->dummy_css which has NULL ->ss and whose only
role is pointing back to the cgroup. This will be used to support
subsystem agnostic features on the coming css based API.
css_parent() is updated to handle dummy_css's. Note that css will
soon grow its own ->parent field and css_parent() will be made
trivial.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to '')
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