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Message-ID: <20200803195342.781987c3@canb.auug.org.au>
Date:   Mon, 3 Aug 2020 19:53:42 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Jens Axboe <axboe@...nel.dk>, Al Viro <viro@...IV.linux.org.uk>
Cc:     Christoph Hellwig <hch@....de>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: manual merge of the init tree with the block tree

Hi all,

On Fri, 17 Jul 2020 19:42:21 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>

> Today's linux-next merge of the init tree got a conflict in:
> 
>   drivers/md/md.c
> 
> between commit:
> 
>   a564e23f0f99 ("md: switch to ->check_events for media change notifications")
> 
> from the block tree and commit:
> 
>   7e0adbfc20c5 ("md: rewrite md_setup_drive to avoid ioctls")
> 
> from the init tree.
> 
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
> 
> diff --cc drivers/md/md.c
> index 5b6d46741baa,ee622b67424e..000000000000
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@@ -7836,21 -7790,23 +7820,21 @@@ static void md_release(struct gendisk *
>   	mddev_put(mddev);
>   }
>   
>  -static int md_media_changed(struct gendisk *disk)
>  -{
>  -	struct mddev *mddev = disk->private_data;
>  -
>  -	return mddev->changed;
>  -}
>  -
>  -static int md_revalidate(struct gendisk *disk)
>  +static unsigned int md_check_events(struct gendisk *disk, unsigned int clearing)
>   {
>   	struct mddev *mddev = disk->private_data;
>  +	unsigned int ret = 0;
>   
>  +	if (mddev->changed)
>  +		ret = DISK_EVENT_MEDIA_CHANGE;
>   	mddev->changed = 0;
>  -	return 0;
>  +	return ret;
>   }
>  +
> - static const struct block_device_operations md_fops =
> + const struct block_device_operations md_fops =
>   {
>   	.owner		= THIS_MODULE,
>  +	.submit_bio	= md_submit_bio,
>   	.open		= md_open,
>   	.release	= md_release,
>   	.ioctl		= md_ioctl,

This is now a conflict between the block tree and the vfs tree.

-- 
Cheers,
Stephen Rothwell

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