percpu_ref_get
percpu_ref_get(&blkg->refcnt);
percpu_ref_get(&this_hctx->queue->q_usage_counter);
percpu_ref_get(&bio->bi_bdev->bd_disk->queue->q_usage_counter);
percpu_ref_get(&srv_path->ids_inflight_ref);
percpu_ref_get(&mddev->writes_pending);
percpu_ref_get(&mddev->writes_pending);
percpu_ref_get(&mddev->active_io);
percpu_ref_get(&req->ns->ref);
percpu_ref_get(ref);
percpu_ref_get(&q->q_usage_counter);
percpu_ref_get(&ctx->reqs);
percpu_ref_get(&ctx->users); /* io_setup() will drop this ref */
percpu_ref_get(&ctx->reqs); /* free_ioctx_users() will drop this */
percpu_ref_get(&wb->refcnt);
percpu_ref_get(&cgrp->bpf.refcnt);
percpu_ref_get(&css->refcnt);
percpu_ref_get(&objcg->refcnt);
percpu_ref_get(&mr->refcount);
percpu_ref_get(&ctx->refs);
percpu_ref_get(&ctx->refs);
percpu_ref_get(&last_ctx->refs);
percpu_ref_get(&ctx->refs);
percpu_ref_get(&ctx->refs);
percpu_ref_get(&tr->pcref);
percpu_ref_get(ref); /* put after confirmation */
percpu_ref_get(ref);
percpu_ref_get(&pool->ref);
percpu_ref_get(&link->wr_reg_refs);
percpu_ref_get(&link->wr_tx_refs);