796 static int check_flags(struct bpf_htab *htab, struct htab_elem *l_old,  in check_flags()  argument
799 	if (l_old && map_flags == BPF_NOEXIST)  in check_flags()
803 	if (!l_old && map_flags == BPF_EXIST)  in check_flags()
815 	struct htab_elem *l_new = NULL, *l_old;  in htab_map_update_elem()  local
838 	l_old = lookup_elem_raw(head, hash, key, key_size);  in htab_map_update_elem()
840 	ret = check_flags(htab, l_old, map_flags);  in htab_map_update_elem()
845 				l_old);  in htab_map_update_elem()
856 	if (l_old) {  in htab_map_update_elem()
857 		hlist_nulls_del_rcu(&l_old->hash_node);  in htab_map_update_elem()
859 			free_htab_elem(htab, l_old);  in htab_map_update_elem()
871 	struct htab_elem *l_new, *l_old = NULL;  in htab_lru_map_update_elem()  local
904 	l_old = lookup_elem_raw(head, hash, key, key_size);  in htab_lru_map_update_elem()
906 	ret = check_flags(htab, l_old, map_flags);  in htab_lru_map_update_elem()
914 	if (l_old) {  in htab_lru_map_update_elem()
916 		hlist_nulls_del_rcu(&l_old->hash_node);  in htab_lru_map_update_elem()
925 	else if (l_old)  in htab_lru_map_update_elem()
926 		bpf_lru_push_free(&htab->lru, &l_old->lru_node);  in htab_lru_map_update_elem()
936 	struct htab_elem *l_new = NULL, *l_old;  in __htab_percpu_map_update_elem()  local
959 	l_old = lookup_elem_raw(head, hash, key, key_size);  in __htab_percpu_map_update_elem()
961 	ret = check_flags(htab, l_old, map_flags);  in __htab_percpu_map_update_elem()
965 	if (l_old) {  in __htab_percpu_map_update_elem()
967 		pcpu_copy_value(htab, htab_elem_get_ptr(l_old, key_size),  in __htab_percpu_map_update_elem()
989 	struct htab_elem *l_new = NULL, *l_old;  in __htab_lru_percpu_map_update_elem()  local
1023 	l_old = lookup_elem_raw(head, hash, key, key_size);  in __htab_lru_percpu_map_update_elem()
1025 	ret = check_flags(htab, l_old, map_flags);  in __htab_lru_percpu_map_update_elem()
1029 	if (l_old) {  in __htab_lru_percpu_map_update_elem()
1030 		bpf_lru_node_set_ref(&l_old->lru_node);  in __htab_lru_percpu_map_update_elem()
1033 		pcpu_copy_value(htab, htab_elem_get_ptr(l_old, key_size),  in __htab_lru_percpu_map_update_elem()