linux-kernel - [PATCH RFC 08/10] sysfs: implement all BIN_ATTR_* macros in terms of __BIN

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Message-Id: <20241031-sysfs-const-bin_attr-v1-8-2281afa7f055@weissschuh.net>
Date: Thu, 31 Oct 2024 02:43:57 +0000
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Dan Williams <dan.j.williams@...el.com>, linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH RFC 08/10] sysfs: implement all BIN_ATTR_* macros in terms
 of __BIN_ATTR()

The preparations for the upcoming constification of struct bin_attribute
requires some logic in the structure definition macros.
To avoid duplication of that logic in multiple macros, reimplement all
other macros in terms of __BIN_ATTR().

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 include/linux/sysfs.h | 27 ++++++++-------------------
 1 file changed, 8 insertions(+), 19 deletions(-)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 8344c0198c61cc44995c38d46d926360e7a88873..5ece63c83ba5829b6eb0f115bdea12a1412ae039 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -331,17 +331,11 @@ struct bin_attribute {
 	.size	= _size,						\
 }
 
-#define __BIN_ATTR_RO(_name, _size) {					\
-	.attr	= { .name = __stringify(_name), .mode = 0444 },		\
-	.read	= _name##_read,						\
-	.size	= _size,						\
-}
+#define __BIN_ATTR_RO(_name, _size)					\
+	__BIN_ATTR(_name, 0444, _name##_read, NULL, _size)
 
-#define __BIN_ATTR_WO(_name, _size) {					\
-	.attr	= { .name = __stringify(_name), .mode = 0200 },		\
-	.write	= _name##_write,					\
-	.size	= _size,						\
-}
+#define __BIN_ATTR_WO(_name, _size)					\
+	__BIN_ATTR(_name, 0200, NULL, _name##_write, _size)
 
 #define __BIN_ATTR_RW(_name, _size)					\
 	__BIN_ATTR(_name, 0644, _name##_read, _name##_write, _size)
@@ -362,11 +356,8 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR_WO(_name, _size)
 struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size)
 
 
-#define __BIN_ATTR_ADMIN_RO(_name, _size) {					\
-	.attr	= { .name = __stringify(_name), .mode = 0400 },		\
-	.read	= _name##_read,						\
-	.size	= _size,						\
-}
+#define __BIN_ATTR_ADMIN_RO(_name, _size)				\
+	__BIN_ATTR(_name, 0400, _name##_read, NULL, _size)
 
 #define __BIN_ATTR_ADMIN_RW(_name, _size)					\
 	__BIN_ATTR(_name, 0600, _name##_read, _name##_write, _size)
@@ -377,10 +368,8 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RO(_name, _size)
 #define BIN_ATTR_ADMIN_RW(_name, _size)					\
 struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RW(_name, _size)
 
-#define __BIN_ATTR_SIMPLE_RO(_name, _mode) {				\
-	.attr	= { .name = __stringify(_name), .mode = _mode },	\
-	.read	= sysfs_bin_attr_simple_read,				\
-}
+#define __BIN_ATTR_SIMPLE_RO(_name, _mode)				\
+	__BIN_ATTR(_name, _mode, sysfs_bin_attr_simple_read, NULL, 0)
 
 #define BIN_ATTR_SIMPLE_RO(_name)					\
 struct bin_attribute bin_attr_##_name = __BIN_ATTR_SIMPLE_RO(_name, 0444)

-- 
2.47.0