[PATCH 2/6] sysfs.h: add ATTRIBUTE_GROUPS() macro

[PATCH 2/6] sysfs.h: add ATTRIBUTE_GROUPS() macro

[Greg Kroah-Hartman]

To make it easier for driver subsystems to work with attribute groups,
create the ATTRIBUTE_GROUPS macro to remove some of the repetitive
typing for the most common use for attribute groups.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/sysfs.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 9cd20c8..f62ff01 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -94,6 +94,15 @@ struct attribute_group {
 #define __ATTR_IGNORE_LOCKDEP	__ATTR
 #endif
 
+#define ATTRIBUTE_GROUPS(name)					\
+static const struct attribute_group name##_group = {		\
+	.attrs = name##_attrs,					\
+};								\
+static const struct attribute_group *name##_groups[] = {	\
+	&name##_group,						\
+	NULL,							\
+}
+
 #define attr_name(_attr) (_attr).attr.name
 
 struct file;
-- 
1.8.3.rc0.20.gb99dd2e

Re: [PATCH 2/6] sysfs.h: add ATTRIBUTE_GROUPS() macro

[Guenter Roeck]

On Wed, Jul 10, 2013 at 01:05:10PM -0700, Greg Kroah-Hartman wrote:
> To make it easier for driver subsystems to work with attribute groups,
> create the ATTRIBUTE_GROUPS macro to remove some of the repetitive
> typing for the most common use for attribute groups.
> 
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
>  include/linux/sysfs.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
> index 9cd20c8..f62ff01 100644
> --- a/include/linux/sysfs.h
> +++ b/include/linux/sysfs.h
> @@ -94,6 +94,15 @@ struct attribute_group {
>  #define __ATTR_IGNORE_LOCKDEP	__ATTR
>  #endif
>  
> +#define ATTRIBUTE_GROUPS(name)					\

Would it be possible to add is_visible as additional argument ?

Thanks,
Guenter

> +static const struct attribute_group name##_group = {		\
> +	.attrs = name##_attrs,					\
> +};								\
> +static const struct attribute_group *name##_groups[] = {	\
> +	&name##_group,						\
> +	NULL,							\
> +}
> +
>  #define attr_name(_attr) (_attr).attr.name
>  
>  struct file;
> -- 
> 1.8.3.rc0.20.gb99dd2e
> 
> 

Re: [PATCH 2/6] sysfs.h: add ATTRIBUTE_GROUPS() macro

[Greg Kroah-Hartman]

On Wed, Jul 10, 2013 at 03:48:56PM -0700, Guenter Roeck wrote:
> On Wed, Jul 10, 2013 at 01:05:10PM -0700, Greg Kroah-Hartman wrote:
> > To make it easier for driver subsystems to work with attribute groups,
> > create the ATTRIBUTE_GROUPS macro to remove some of the repetitive
> > typing for the most common use for attribute groups.
> > 
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > ---
> >  include/linux/sysfs.h | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> > 
> > diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
> > index 9cd20c8..f62ff01 100644
> > --- a/include/linux/sysfs.h
> > +++ b/include/linux/sysfs.h
> > @@ -94,6 +94,15 @@ struct attribute_group {
> >  #define __ATTR_IGNORE_LOCKDEP	__ATTR
> >  #endif
> >  
> > +#define ATTRIBUTE_GROUPS(name)					\
> 
> Would it be possible to add is_visible as additional argument ?

I thought about the other options (multiple groups, is_visible, and
bin_attrs), but those are almost all not the "normal" usage, so I figure
it's worth the extra 6 lines of text if you want to support is_visible
or binary attributes.

After converting all of the class code to use groups, it seems to match
up with the defaults, but if in the future it's more popular than
expected, I'll gladly add it.

thanks,

greg k-h

Re: [PATCH 2/6] sysfs.h: add ATTRIBUTE_GROUPS() macro

[Guenter Roeck]

On Wed, Jul 10, 2013 at 03:57:30PM -0700, Greg Kroah-Hartman wrote:
> On Wed, Jul 10, 2013 at 03:48:56PM -0700, Guenter Roeck wrote:
> > On Wed, Jul 10, 2013 at 01:05:10PM -0700, Greg Kroah-Hartman wrote:
> > > To make it easier for driver subsystems to work with attribute groups,
> > > create the ATTRIBUTE_GROUPS macro to remove some of the repetitive
> > > typing for the most common use for attribute groups.
> > > 
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > ---
> > >  include/linux/sysfs.h | 9 +++++++++
> > >  1 file changed, 9 insertions(+)
> > > 
> > > diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
> > > index 9cd20c8..f62ff01 100644
> > > --- a/include/linux/sysfs.h
> > > +++ b/include/linux/sysfs.h
> > > @@ -94,6 +94,15 @@ struct attribute_group {
> > >  #define __ATTR_IGNORE_LOCKDEP	__ATTR
> > >  #endif
> > >  
> > > +#define ATTRIBUTE_GROUPS(name)					\
> > 
> > Would it be possible to add is_visible as additional argument ?
> 
> I thought about the other options (multiple groups, is_visible, and
> bin_attrs), but those are almost all not the "normal" usage, so I figure
> it's worth the extra 6 lines of text if you want to support is_visible
> or binary attributes.
> 
Ok, fair enough.

Thanks,
Guenter