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Message-Id: <20251029-sysfs-const-attr-prep-v5-2-ea7d745acff4@weissschuh.net>
Date: Wed, 29 Oct 2025 09:12:11 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v5 2/7] sysfs: transparently handle const pointers in
ATTRIBUTE_GROUPS()
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@...ssschuh.net>
---
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 e34d6af96abb..92f82cee5f11 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -287,7 +287,12 @@ 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)
--
2.51.1.dirty
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