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cgroup, blkcg: Prepare some symbols for module and !CONFIG_CGROUP usages

btrfs is going to use css_put() and wbc helpers to improve cgroup writeback support. Add dummy css_get() definition and export wbc helpers to prepare for module and !CONFIG_CGROUP builds.

Tejun Heo committed 7 years ago

Commit 9b0eb691 parent fd112c73 files · +5 −0Browse files

Showing the changes to include/linux (1 of 3 files). Show all

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include/linux/cgroup.h+1−0
@@ -699,6 +699,7 @@ void cgroup_path_from_kernfs_id(const union kernfs_node_id *id, · 698 unmodified lines
699struct cgroup_subsys_state;699struct cgroup_subsys_state;
700struct cgroup;700struct cgroup;
701 701
702static inline void css_get(struct cgroup_subsys_state *css) {}
702static inline void css_put(struct cgroup_subsys_state *css) {}703static inline void css_put(struct cgroup_subsys_state *css) {}
703static inline int cgroup_attach_task_all(struct task_struct *from,704static inline int cgroup_attach_task_all(struct task_struct *from,
704 struct task_struct *t) { return 0; }705 struct task_struct *t) { return 0; }

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