linux-kernel - Re: [PATCH v2] SCSI: fcoe: convert to use BUS_ATTR

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Message-ID: <3e91c991-8090-405a-58cf-0686e9a82a51@suse.de>
Date:   Sat, 26 Jan 2019 11:26:47 +0100
From:   Hannes Reinecke <hare@...e.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johannes Thumshirn <jth@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH v2] SCSI: fcoe: convert to use BUS_ATTR_WO

On 1/22/19 3:27 PM, Greg Kroah-Hartman wrote:
> We are trying to get rid of BUS_ATTR() and the usage of that in the fcoe
> driver can be trivially converted to use BUS_ATTR_WO(), so use that
> instead.
> 
> Cc: Johannes Thumshirn <jth@...nel.org>
> Cc: "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@...cle.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
> v2: Made simpler with wrapper functions to call the "real" show/store
>      functions, thanks to James for the idea.
>      Removed the EXPORT_SYMBOL() removal line, that belongs in a separate
>      patch
> 
>   drivers/scsi/fcoe/fcoe_sysfs.c | 15 +++++++++++++--
>   1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c
> index 5c8310bade61..c3dcbdc3aa64 100644
> --- a/drivers/scsi/fcoe/fcoe_sysfs.c
> +++ b/drivers/scsi/fcoe/fcoe_sysfs.c
> @@ -671,8 +671,19 @@ static const struct device_type fcoe_fcf_device_type = {
>   	.release = fcoe_fcf_device_release,
>   };
>   
> -static BUS_ATTR(ctlr_create, S_IWUSR, NULL, fcoe_ctlr_create_store);
> -static BUS_ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store);
> +static ssize_t ctlr_create_store(struct bus_type *bus, const char *buf,
> +				 size_t count)
> +{
> +	return fcoe_ctlr_create_store(bus, buf, count);
> +}
> +static BUS_ATTR_WO(ctlr_create);
> +
> +static ssize_t ctlr_destroy_store(struct bus_type *bus, const char *buf,
> +				  size_t count)
> +{
> +	return fcoe_ctlr_destroy_store(bus, buf, count);
> +}
> +static BUS_ATTR_WO(ctlr_destroy);
>   
>   static struct attribute *fcoe_bus_attrs[] = {
>   	&bus_attr_ctlr_create.attr,
> 
Why not renaming the functions and drop the wrapper?

Cheers,

Hannes