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cgroup: unexport cgroup_css()
cgroup_css() no longer has any user left outside cgroup.c proper and we don't want subsystems to grow new usages of the function. cgroup core should always provide the css to use to the subsystems, which will make dynamic creation and destruction of css's across the lifetime of a cgroup much more manageable than exposing the cgroup directly to subsystems and let them dereference css's from it. Make cgroup_css() a static function in cgroup.c. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com>
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@ -677,19 +677,6 @@ struct cgroup_subsys_state *css_parent(struct cgroup_subsys_state *css)
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return &parent_cgrp->dummy_css;
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}
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/**
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* cgroup_css - obtain a cgroup's css for the specified subsystem
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* @cgrp: the cgroup of interest
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* @subsys_id: the subsystem of interest
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*
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* Return @cgrp's css (cgroup_subsys_state) associated with @subsys_id.
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*/
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static inline struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,
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int subsys_id)
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{
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return cgrp->subsys[subsys_id];
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}
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/**
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* task_css_set_check - obtain a task's css_set with extra access conditions
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* @task: the task to obtain css_set for
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@ -222,6 +222,19 @@ static int cgroup_destroy_locked(struct cgroup *cgrp);
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static int cgroup_addrm_files(struct cgroup *cgrp, struct cftype cfts[],
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bool is_add);
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/**
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* cgroup_css - obtain a cgroup's css for the specified subsystem
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* @cgrp: the cgroup of interest
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* @subsys_id: the subsystem of interest
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*
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* Return @cgrp's css (cgroup_subsys_state) associated with @subsys_id.
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*/
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static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,
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int subsys_id)
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{
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return cgrp->subsys[subsys_id];
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}
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/* convenient tests for these bits */
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static inline bool cgroup_is_dead(const struct cgroup *cgrp)
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{
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