linux-kernel - Re: [PATCH 01/17] drbd: introduce drbd_recv_header_maybe

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Date:   Fri, 25 Aug 2017 11:26:20 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Philipp Reisner <philipp.reisner@...bit.com>,
        linux-kernel@...r.kernel.org
Cc:     drbd-dev@...ts.linbit.com
Subject: Re: [PATCH 01/17] drbd: introduce drbd_recv_header_maybe_unplug

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