linux-kernel - Re: [PATCH 1/2] sysfs: Add helper BIN_ATTRIBUTE

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Date:   Fri, 21 May 2021 20:41:28 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] sysfs: Add helper BIN_ATTRIBUTE_GROUPS

On Wed, May 19, 2021 at 09:02:47PM +0200, Heiner Kallweit wrote:
> On 19.05.2021 19:04, Greg Kroah-Hartman wrote:
> > On Wed, May 19, 2021 at 06:33:14PM +0200, Heiner Kallweit wrote:
> >> New helper BIN_ATTRIBUTE_GROUPS() does the same as ATTRIBUTE_GROUPS(),
> >> just for binary attributes.
> >>
> >> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
> >> ---
> >>  include/linux/sysfs.h | 6 ++++++
> >>  1 file changed, 6 insertions(+)
> >>
> >> diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
> >> index d76a1ddf8..a12556a4b 100644
> >> --- a/include/linux/sysfs.h
> >> +++ b/include/linux/sysfs.h
> >> @@ -162,6 +162,12 @@ static const struct attribute_group _name##_group = {		\
> >>  };								\
> >>  __ATTRIBUTE_GROUPS(_name)
> >>  
> >> +#define BIN_ATTRIBUTE_GROUPS(_name)				\
> >> +static const struct attribute_group _name##_group = {		\
> >> +	.bin_attrs = _name##_attrs,				\
> >> +};								\
> >> +__ATTRIBUTE_GROUPS(_name)
> > 
> > Is this really needed by more than just 1 driver?
> > 
> Few more use case I saw:
> devcd_dev_groups in drivers/base/devcoredump.c
> w1_f3a_group in drivers/w1/slaves/w1_ds2413.c
> w1_slave_default_groups in drivers/w1/w1.c

Ok, might as well, can't hurt to add this :)

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>