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sysfs: transparently handle const pointers in ATTRIBUTE_GROUPS()

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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@weissschuh.net>
Link: https://patch.msgid.link/20251029-sysfs-const-attr-prep-v5-2-ea7d745acff4@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Weißschuh
2025-10-29 09:12:11 +01:00
committed by Greg Kroah-Hartman
parent f85d90dd8d
commit 964c93b1ee
1 changed files with 6 additions and 1 deletions
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7
include/linux/sysfs.h
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@@ -287,7 +287,12 @@ static const struct attribute_group *_name##_groups[] = { \
#define ATTRIBUTE_GROUPS(_name) \ #define ATTRIBUTE_GROUPS(_name) \
static const struct attribute_group _name##_group = { \ 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) __ATTRIBUTE_GROUPS(_name)