399 	struct stack_map_bucket *bucket, *new_bucket, *old_bucket;  in __bpf_get_stackid()  local
467 	old_bucket = xchg(&smap->buckets[id], new_bucket);  in __bpf_get_stackid()
468 	if (old_bucket)  in __bpf_get_stackid()
469 		pcpu_freelist_push(&smap->freelist, &old_bucket->fnode);  in __bpf_get_stackid()
754 	struct stack_map_bucket *bucket, *old_bucket;  in bpf_stackmap_copy()  local
768 	old_bucket = xchg(&smap->buckets[id], bucket);  in bpf_stackmap_copy()
769 	if (old_bucket)  in bpf_stackmap_copy()
770 		pcpu_freelist_push(&smap->freelist, &old_bucket->fnode);  in bpf_stackmap_copy()
813 	struct stack_map_bucket *old_bucket;  in stack_map_delete_elem()  local
819 	old_bucket = xchg(&smap->buckets[id], NULL);  in stack_map_delete_elem()
820 	if (old_bucket) {  in stack_map_delete_elem()
821 		pcpu_freelist_push(&smap->freelist, &old_bucket->fnode);  in stack_map_delete_elem()