linux-kernel - Re: [PATCH] block: Remove request_queue argument from blk_execute_rq

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Message-ID: <20190806051911.GA13409@lst.de>
Date:   Tue, 6 Aug 2019 07:19:11 +0200
From:   Christoph Hellwig <hch@....de>
To:     Marcos Paulo de Souza <marcos.souza.org@...il.com>
Cc:     linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Doug Gilbert <dgilbert@...erlog.com>,
        Kai Mäkisara <Kai.Makisara@...umbus.fi>,
        Hannes Reinecke <hare@...e.com>,
        Omar Sandoval <osandov@...com>, Ming Lei <ming.lei@...hat.com>,
        Chaitanya Kulkarni <chaitanya.kulkarni@....com>,
        Damien Le Moal <damien.lemoal@....com>,
        Bart Van Assche <bvanassche@....org>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>,
        "open list:NVM EXPRESS DRIVER" <linux-nvme@...ts.infradead.org>,
        "open list:SCSI SUBSYSTEM" <linux-scsi@...r.kernel.org>,
        "open list:SCSI TARGET SUBSYSTEM" <target-devel@...r.kernel.org>
Subject: Re: [PATCH] block: Remove request_queue argument from
 blk_execute_rq_nowait

On Mon, Aug 05, 2019 at 10:17:51PM -0300, Marcos Paulo de Souza wrote:
> +void blk_execute_rq_nowait(struct gendisk *bd_disk, struct request *rq,
> +			int at_head, rq_end_io_fn *done)

We store a ->rq_disk in struct request, so we should also not need
that.  And at_head should either become a bool, or be replaced with
a flags argument, ints used boolean are usually not a good idea.

> @@ -81,7 +80,7 @@ void blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,

And all the same argument changes that apply to blk_execute_rq_nowait
apply to blk_execute_rq as well.