[PATCH 2/6] sysfs: transparently handle const pointers in ATTRIBUTE_GROUPS()

[Thomas Weißschuh]

To ease the constification process of 'struct attribute', transparently
handle the const pointers in ATTRIBUTE_GROUPS().
A cast is used instead of assigning to .attrs_new as it keeps the macro
smaller. As both members are aliased to each other the result is
identical.

Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
 include/linux/sysfs.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index f5e25bed777a6a6e717f10973f1abcd12111f5c5..52d4862bbcef2a6b143710a19801222bf7abc346 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -290,7 +290,12 @@ static const struct attribute_group *_name##_groups[] = {	\
 
 #define ATTRIBUTE_GROUPS(_name)					\
 static const struct attribute_group _name##_group = {		\
-	.attrs = _name##_attrs,					\
+	.attrs = _Generic(_name##_attrs,			\
+			  struct attribute **:			\
+				_name##_attrs,			\
+			  const struct attribute *const *:	\
+				(void *)_name##_attrs		\
+	),							\
 };								\
 __ATTRIBUTE_GROUPS(_name)
 

-- 
2.48.1