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Message-Id: <20250629-sysfs-const-attr-prep-v2-2-9ec5fe39083f@weissschuh.net>
Date: Sun, 29 Jun 2025 07:26:03 +0200
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 v2 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 a47092e837d9eb014894d1f7e49f0fd0f9a2e350..118a9b1d3b3e7528fb213d83f85d31bbac0dc309 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)
--
2.50.0
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