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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/linux/cgroup.h
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@@ -24,8 +24,11 @@
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 #include <linux/user_namespace.h>
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 #include <linux/refcount.h>
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 #include <linux/kernel_stat.h>
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+#include <linux/android_kabi.h>
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 #include <linux/cgroup-defs.h>
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+
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+struct kernel_clone_args;
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 #ifdef CONFIG_CGROUPS
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@@ -58,19 +61,20 @@
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 	struct list_head		*tcset_head;
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 	struct list_head		*task_pos;
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-	struct list_head		*tasks_head;
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-	struct list_head		*mg_tasks_head;
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-	struct list_head		*dying_tasks_head;
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 	struct list_head		*cur_tasks_head;
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 	struct css_set			*cur_cset;
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 	struct css_set			*cur_dcset;
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 	struct task_struct		*cur_task;
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 	struct list_head		iters_node;	/* css_set->task_iters */
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+
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+	ANDROID_KABI_RESERVE(1);
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 };
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+extern struct file_system_type cgroup_fs_type;
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 extern struct cgroup_root cgrp_dfl_root;
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-extern struct css_set init_css_set;
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+extern struct ext_css_set init_ext_css_set;
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+#define init_css_set init_ext_css_set.cset
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 #define SUBSYS(_x) extern struct cgroup_subsys _x ## _cgrp_subsys;
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 #include <linux/cgroup_subsys.h>
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@@ -98,6 +102,8 @@
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 bool css_has_online_children(struct cgroup_subsys_state *css);
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 struct cgroup_subsys_state *css_from_id(int id, struct cgroup_subsys *ss);
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+struct cgroup_subsys_state *cgroup_e_css(struct cgroup *cgroup,
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+					 struct cgroup_subsys *ss);
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 struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgroup,
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 					     struct cgroup_subsys *ss);
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 struct cgroup_subsys_state *css_tryget_online_from_dir(struct dentry *dentry,
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@@ -120,9 +126,12 @@
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 		     struct pid *pid, struct task_struct *tsk);
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 void cgroup_fork(struct task_struct *p);
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-extern int cgroup_can_fork(struct task_struct *p);
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-extern void cgroup_cancel_fork(struct task_struct *p);
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-extern void cgroup_post_fork(struct task_struct *p);
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+extern int cgroup_can_fork(struct task_struct *p,
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+			   struct kernel_clone_args *kargs);
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+extern void cgroup_cancel_fork(struct task_struct *p,
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+			       struct kernel_clone_args *kargs);
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+extern void cgroup_post_fork(struct task_struct *p,
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+			     struct kernel_clone_args *kargs);
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 void cgroup_exit(struct task_struct *p);
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 void cgroup_release(struct task_struct *p);
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 void cgroup_free(struct task_struct *p);
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@@ -303,6 +312,11 @@
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  * Inline functions.
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  */
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314
 
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+static inline u64 cgroup_id(struct cgroup *cgrp)
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+{
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+	return cgrp->kn->id;
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+}
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+
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 /**
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  * css_get - obtain a reference on the specified css
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  * @css: target css
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@@ -441,6 +455,7 @@
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 extern spinlock_t css_set_lock;
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 #define task_css_set_check(task, __c)					\
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 	rcu_dereference_check((task)->cgroups,				\
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+		rcu_read_lock_sched_held() ||				\
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 		lockdep_is_held(&cgroup_mutex) ||			\
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 		lockdep_is_held(&css_set_lock) ||			\
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 		((task)->flags & PF_EXITING) || (__c))
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@@ -564,7 +579,7 @@
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 {
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 	if (cgrp->root != ancestor->root || cgrp->level < ancestor->level)
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 		return false;
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-	return cgrp->ancestor_ids[ancestor->level] == ancestor->id;
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+	return cgrp->ancestor_ids[ancestor->level] == cgroup_id(ancestor);
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 }
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 /**
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@@ -615,7 +630,7 @@
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 /* returns ino associated with a cgroup */
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 static inline ino_t cgroup_ino(struct cgroup *cgrp)
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 {
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-	return cgrp->kn->id.ino;
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+	return kernfs_ino(cgrp->kn);
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 }
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 /* cft/css accessors for cftype->write() operation */
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@@ -688,18 +703,14 @@
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 	current->no_cgroup_migration = 0;
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 }
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-static inline union kernfs_node_id *cgroup_get_kernfs_id(struct cgroup *cgrp)
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-{
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-	return &cgrp->kn->id;
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-}
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-
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-void cgroup_path_from_kernfs_id(const union kernfs_node_id *id,
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-					char *buf, size_t buflen);
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+void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen);
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 #else /* !CONFIG_CGROUPS */
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 struct cgroup_subsys_state;
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 struct cgroup;
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+static inline u64 cgroup_id(struct cgroup *cgrp) { return 1; }
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+static inline void css_get(struct cgroup_subsys_state *css) {}
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 static inline void css_put(struct cgroup_subsys_state *css) {}
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 static inline int cgroup_attach_task_all(struct task_struct *from,
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 					 struct task_struct *t) { return 0; }
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@@ -707,9 +718,12 @@
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 				    struct dentry *dentry) { return -EINVAL; }
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 static inline void cgroup_fork(struct task_struct *p) {}
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-static inline int cgroup_can_fork(struct task_struct *p) { return 0; }
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-static inline void cgroup_cancel_fork(struct task_struct *p) {}
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-static inline void cgroup_post_fork(struct task_struct *p) {}
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+static inline int cgroup_can_fork(struct task_struct *p,
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+				  struct kernel_clone_args *kargs) { return 0; }
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+static inline void cgroup_cancel_fork(struct task_struct *p,
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+				      struct kernel_clone_args *kargs) {}
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+static inline void cgroup_post_fork(struct task_struct *p,
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+				    struct kernel_clone_args *kargs) {}
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 static inline void cgroup_exit(struct task_struct *p) {}
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 static inline void cgroup_release(struct task_struct *p) {}
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 static inline void cgroup_free(struct task_struct *p) {}
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@@ -718,10 +732,6 @@
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 static inline int cgroup_init(void) { return 0; }
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 static inline void cgroup_init_kthreadd(void) {}
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 static inline void cgroup_kthread_ready(void) {}
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-static inline union kernfs_node_id *cgroup_get_kernfs_id(struct cgroup *cgrp)
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-{
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-	return NULL;
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-}
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 static inline struct cgroup *cgroup_parent(struct cgroup *cgrp)
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 {
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@@ -744,8 +754,8 @@
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 	return true;
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 }
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-static inline void cgroup_path_from_kernfs_id(const union kernfs_node_id *id,
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-	char *buf, size_t buflen) {}
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+static inline void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen)
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+{}
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 #endif /* !CONFIG_CGROUPS */
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 #ifdef CONFIG_CGROUPS
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@@ -781,11 +791,9 @@
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 	cpuacct_charge(task, delta_exec);
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-	rcu_read_lock();
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 	cgrp = task_dfl_cgroup(task);
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 	if (cgroup_parent(cgrp))
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 		__cgroup_account_cputime(cgrp, delta_exec);
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-	rcu_read_unlock();
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 }
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 static inline void cgroup_account_cputime_field(struct task_struct *task,
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@@ -909,7 +917,7 @@
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 void cgroup_freeze(struct cgroup *cgrp, bool freeze);
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 void cgroup_freezer_migrate_task(struct task_struct *task, struct cgroup *src,
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 				 struct cgroup *dst);
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-void cgroup_freezer_frozen_exit(struct task_struct *task);
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+
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 static inline bool cgroup_task_freeze(struct task_struct *task)
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 {
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 	bool ret;
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@@ -944,4 +952,22 @@
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 #endif /* !CONFIG_CGROUPS */
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+#ifdef CONFIG_CGROUP_BPF
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+static inline void cgroup_bpf_get(struct cgroup *cgrp)
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+{
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+	percpu_ref_get(&cgrp->bpf.refcnt);
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+}
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+
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+static inline void cgroup_bpf_put(struct cgroup *cgrp)
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+{
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+	percpu_ref_put(&cgrp->bpf.refcnt);
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+}
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+
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+#else /* CONFIG_CGROUP_BPF */
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+
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+static inline void cgroup_bpf_get(struct cgroup *cgrp) {}
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+static inline void cgroup_bpf_put(struct cgroup *cgrp) {}
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+
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+#endif /* CONFIG_CGROUP_BPF */
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+
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 #endif /* _LINUX_CGROUP_H */