linux-kernel - Re: [PATCH] block: Restore /proc/partitions to not display non-partitionable removable devices

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Date:	Tue, 27 Nov 2012 09:58:33 -0600
From:	Josh Hunt <johunt@...mai.com>
To:	"jaxboe@...ionio.com" <jaxboe@...ionio.com>
CC:	Josh Hunt <johunt@...mai.com>,
	"kay.sievers@...y.org" <kay.sievers@...y.org>,
	"tj@...nel.org" <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] block: Restore /proc/partitions to not display non-partitionable
 removable devices

ping?

On 11/19/2012 08:56 PM, Josh Hunt wrote:
> We found with newer kernels we started seeing the cdrom device showing
> up in /proc/partitions, but it was not there before. Looking into this I found
> that commit d27769ec... block: add GENHD_FL_NO_PART_SCAN introduces this change
> in behavior. It's not clear to me from the commit's changelog if this change was
> intentional or not. This comment still remains:
> /* Don't show non-partitionable removeable devices or empty devices */
> so I've decided to send a patch to restore the behavior of not printing
> unpartitionable removable devices.
>
> Thanks
> Josh
> ---
>
> After commit d27769ec... block: add GENHD_FL_NO_PART_SCAN, /proc/partitions
> started printing removable devices with only one partition. This is different
> than prior to the commit. This restores /proc/partitions to behave as it did before.
>
> Signed-off-by: Josh Hunt <johunt@...mai.com>
> ---
>   block/genhd.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/block/genhd.c b/block/genhd.c
> index 6cace66..6bfeb2a 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -851,7 +851,7 @@ static int show_partition(struct seq_file *seqf, void *v)
>   	char buf[BDEVNAME_SIZE];
>
>   	/* Don't show non-partitionable removeable devices or empty devices */
> -	if (!get_capacity(sgp) || (!disk_max_parts(sgp) &&
> +	if (!get_capacity(sgp) || (!(disk_max_parts(sgp) > 1) &&
>   				   (sgp->flags & GENHD_FL_REMOVABLE)))
>   		return 0;
>   	if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
>
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