linux-kernel - Re: [patch] remove artificial software max

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Date:	Fri, 30 Mar 2007 11:07:52 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Ken Chen <kenchen@...gle.com>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch] remove artificial software max_loop limit


On Mar 30 2007 01:48, Ken Chen wrote:
> On 3/30/07, Ken Chen <kenchen@...gle.com> wrote:

> @@ -812,7 +811,7 @@ static int loop_set_fd
> lo->lo_queue->queuedata = lo;
> lo->lo_queue->unplug_fn = loop_unplug;
>
> -	set_capacity(disks[lo->lo_number], size);
> +	set_capacity(lo->lo_disk, size);
> bd_set_size(bdev, size << 9);
>
> 	set_blocksize(bdev, lo_blocksize);
> @@ -832,7 +831,7 @@ out_clr:
> lo->lo_device = NULL;
> lo->lo_backing_file = NULL;
> lo->lo_flags = 0;
> -	set_capacity(disks[lo->lo_number], 0);
> +	set_capacity(lo->lo_disk, 0);
> invalidate_bdev(bdev, 0);
> bd_set_size(bdev, 0);
> mapping_set_gfp_mask(mapping, lo->old_gfp_mask);

Welcome to Google Mail, we eat your whitespace :-)

> +	sprintf(disk->disk_name, "loop%d", i);

Let's make this %u, no?

> +static struct kobject *loop_probe(dev_t dev, int *part, void *data)
> +{
> +	unsigned int number = dev & MINORMASK;
> +	struct loop_device *lo;
>
> -	for (i = 0; i < max_loop; i++) {
> -		disks[i] = alloc_disk(1);
> -		if (!disks[i])
> -			goto out_mem3;
> -	}

Could not we use kobject_uevent(), like I did (though perhaps without
the k.oops), to make udev create a node?


Jan
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