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Message-ID: <ZXAMwBD8pd48qwX/@infradead.org>
Date:   Tue, 5 Dec 2023 21:55:12 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Yu Kuai <yukuai1@...weicloud.com>
Cc:     axboe@...nel.dk, roger.pau@...rix.com, colyli@...e.de,
        kent.overstreet@...il.com, joern@...ybastard.org,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        sth@...ux.ibm.com, hoeppner@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, agordeev@...ux.ibm.com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, clm@...com, josef@...icpanda.com,
        dsterba@...e.com, nico@...xnic.net, xiang@...nel.org,
        chao@...nel.org, tytso@....edu, adilger.kernel@...ger.ca,
        agruenba@...hat.com, jack@...e.com, konishi.ryusuke@...il.com,
        willy@...radead.org, akpm@...ux-foundation.org, hare@...e.de,
        p.raghav@...sung.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-bcache@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-bcachefs@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org,
        gfs2@...ts.linux.dev, linux-nilfs@...r.kernel.org,
        yukuai3@...wei.com, yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH -next RFC 02/14] xen/blkback: use bdev api in
 xen_update_blkif_status()

On Tue, Dec 05, 2023 at 08:37:16PM +0800, Yu Kuai wrote:
> diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
> index e34219ea2b05..e645afa4af57 100644
> --- a/drivers/block/xen-blkback/xenbus.c
> +++ b/drivers/block/xen-blkback/xenbus.c
> @@ -104,8 +104,7 @@ static void xen_update_blkif_status(struct xen_blkif *blkif)
>  		xenbus_dev_error(blkif->be->dev, err, "block flush");
>  		return;
>  	}
> -	invalidate_inode_pages2(
> -			blkif->vbd.bdev_handle->bdev->bd_inode->i_mapping);
> +	invalidate_bdev(blkif->vbd.bdev_handle->bdev);

blkbak is a bdev exported.   I don't think it should ever call
invalidate_inode_pages2, through a wrapper or not.

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