259 	struct bpf_local_storage *prev_storage, *storage;  in bpf_local_storage_alloc()  local
263 	err = mem_charge(smap, owner, sizeof(*storage));  in bpf_local_storage_alloc()
267 	storage = kzalloc(sizeof(*storage), GFP_ATOMIC | __GFP_NOWARN);  in bpf_local_storage_alloc()
268 	if (!storage) {  in bpf_local_storage_alloc()
273 	INIT_HLIST_HEAD(&storage->list);  in bpf_local_storage_alloc()
274 	raw_spin_lock_init(&storage->lock);  in bpf_local_storage_alloc()
275 	storage->owner = owner;  in bpf_local_storage_alloc()
277 	bpf_selem_link_storage_nolock(storage, first_selem);  in bpf_local_storage_alloc()
282 	/* Publish storage to the owner.  in bpf_local_storage_alloc()
287 	 * From now on, the owner->storage pointer (e.g. sk->sk_bpf_storage)  in bpf_local_storage_alloc()
288 	 * is protected by the storage->lock.  Hence, when freeing  in bpf_local_storage_alloc()
289 	 * the owner->storage, the storage->lock must be held before  in bpf_local_storage_alloc()
290 	 * setting owner->storage ptr to NULL.  in bpf_local_storage_alloc()
292 	prev_storage = cmpxchg(owner_storage_ptr, NULL, storage);  in bpf_local_storage_alloc()
311 	kfree(storage);  in bpf_local_storage_alloc()
312 	mem_uncharge(smap, owner, sizeof(*storage));  in bpf_local_storage_alloc()
484 	 * to the owner->storage or to the map bucket's list.  in bpf_local_storage_map_free()
487 	 * or when the storage is freed e.g.  in bpf_local_storage_map_free()
504 	/* While freeing the storage we may still need to access the map.  in bpf_local_storage_map_free()
510 	 * However, while freeing the storage one still needs to access the  in bpf_local_storage_map_free()
514 	 * Hence, wait another rcu grace period for the storage to be freed.  in bpf_local_storage_map_free()