linux-kernel - Re: [PATCH] scsi scsi_transport_iscsi.c: fix misuse of %llu in scsi_transport

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Date:   Fri, 08 Oct 2021 20:14:36 -0700
From:   Joe Perches <joe@...ches.com>
To:     Guo Zhi <qtxuning1999@...u.edu.cn>, Lee Duncan <lduncan@...e.com>,
        Chris Leech <cleech@...hat.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     open-iscsi@...glegroups.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi scsi_transport_iscsi.c: fix misuse of %llu in
 scsi_transport_iscsi.c

On Sat, 2021-10-09 at 11:02 +0800, Guo Zhi wrote:
> Pointers should be printed with %p or %px rather than
> cast to (unsigned long long) and printed with %llu.
> Change %llu to %p to print the pointer into sysfs.
][]
> diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
[]
> @@ -129,8 +129,8 @@ show_transport_handle(struct device *dev, struct device_attribute *attr,
>  
> 
>  	if (!capable(CAP_SYS_ADMIN))
>  		return -EACCES;
> -	return sysfs_emit(buf, "%llu\n",
> -		  (unsigned long long)iscsi_handle(priv->iscsi_transport));
> +	return sysfs_emit(buf, "%p\n",
> +		iscsi_ptr(priv->iscsi_transport));

iscsi_transport is a pointer isn't it?

so why not just

	return sysfs_emit(buf, "%p\n", priv->iscsi_transport);

?