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| author |   Tejun Heo <tj@kernel.org> | 2014-11-18 02:49:52 -0500 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-11-18 02:49:52 -0500 |
| commit | eeecbd1971517103e06f11750dd1a9a1dc37e4e6 (patch) | |
| tree | ace58390ca7f2e7f7530a8a8b23d9449a00ae3be /include/linux/cgroup.h | |
| parent | cgroup: add cgroup_subsys->css_e_css_changed() (diff) | |
| download | wireguard-linux-eeecbd1971517103e06f11750dd1a9a1dc37e4e6.tar.xz wireguard-linux-eeecbd1971517103e06f11750dd1a9a1dc37e4e6.zip | |
cgroup: implement cgroup_get_e_css()
Implement cgroup_get_e_css() which finds and gets the effective css
for the specified cgroup and subsystem combination. This function
always returns a valid pinned css. This will be used by cgroup
writeback support.
While at it, add comment to cgroup_e_css() to explain why that
function is different from cgroup_get_e_css() and has to test
cgrp->child_subsys_mask instead of cgroup_css(cgrp, ss).
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 3a04aeb8b5a1..9fd99f5e699f 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -910,6 +910,8 @@ void css_task_iter_end(struct css_task_iter *it); int cgroup_attach_task_all(struct task_struct *from, struct task_struct *); int cgroup_transfer_tasks(struct cgroup *to, struct cgroup *from); +struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgroup, + struct cgroup_subsys *ss); struct cgroup_subsys_state *css_tryget_online_from_dir(struct dentry *dentry, struct cgroup_subsys *ss); |