[PATCH] sysfs: Add __ATTR_RELAY() helper for relay attributes.

[Paul Mundt <lethal@linux-sh.org>]

On Mon, Feb 20, 2006 at 02:24:49PM -0800, Greg KH wrote:
> One thing to note, a lot of people forgot to set that field for binary
> attribute files, while "normal" attributes get it set "automatically"
> due to the macro that was used to create them.  You might consider also
> creating a macro for this struture so people can not forget to set the
> field.
> 
Good point, how about this?

This adds a simple __ATTR_RELAY() to help people define relay attributes,
this takes care of things like getting the module owner right.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

---

 include/linux/sysfs.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

5a1440482f48b3ab4b8365a8081295869992bad2
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 0faca48..36a078e 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -44,6 +44,16 @@ struct attribute_group {
 	.show	= _name##_show,	\
 }
 
+#define __ATTR_RELAY(_name,_buffer_size,_nr_buffers) {	\
+	.attr	= {					\
+		.owner = THIS_MODULE,			\
+		.name = __stringify(_name),		\
+		.mode = 0400,				\
+	},						\
+	.subbuf_size	= _buffer_size,			\
+	.n_subbufs	= _nr_buffers,			\
+}
+
 #define __ATTR_NULL { .attr = { .name = NULL } }
 
 #define attr_name(_attr) (_attr).attr.name