[Drbd-dev] [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug

[Jens Axboe]

On 08/24/2017 03:22 PM, Philipp Reisner wrote:
> +#ifndef blk_queue_plugged
> +struct drbd_plug_cb {
> +	struct blk_plug_cb cb;
> +	struct drbd_request *most_recent_req;
> +	/* do we need more? */
> +};

What is this blk_queue_plugged ifdef?

-- 
Jens Axboe