linux-kernel - [PATCH 05/10] HID: roccat: isku: constify 'struct bin

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Message-Id: <20241202-sysfs-const-bin_attr-hid-v1-5-16369423a48a@weissschuh.net>
Date: Mon, 02 Dec 2024 20:01:36 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Jiri Kosina <jikos@...nel.org>, Benjamin Tissoires <bentiss@...nel.org>, 
 Stefan Achatz <erazor_de@...rs.sourceforge.net>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 05/10] HID: roccat: isku: constify 'struct bin_attribute'

The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 drivers/hid/hid-roccat-isku.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/hid/hid-roccat-isku.c b/drivers/hid/hid-roccat-isku.c
index 0cd6208fb371eddd10f6d47d6a70036f6b7d4796..65a84bfcc2f86432753c148dbb78d77de70bafb9 100644
--- a/drivers/hid/hid-roccat-isku.c
+++ b/drivers/hid/hid-roccat-isku.c
@@ -156,7 +156,7 @@ static ssize_t isku_sysfs_write(struct file *fp, struct kobject *kobj,
 
 #define ISKU_SYSFS_W(thingy, THINGY) \
 static ssize_t isku_sysfs_write_ ## thingy(struct file *fp, struct kobject *kobj, \
-		struct bin_attribute *attr, char *buf, \
+		const struct bin_attribute *attr, char *buf, \
 		loff_t off, size_t count) \
 { \
 	return isku_sysfs_write(fp, kobj, buf, off, count, \
@@ -165,7 +165,7 @@ static ssize_t isku_sysfs_write_ ## thingy(struct file *fp, struct kobject *kobj
 
 #define ISKU_SYSFS_R(thingy, THINGY) \
 static ssize_t isku_sysfs_read_ ## thingy(struct file *fp, struct kobject *kobj, \
-		struct bin_attribute *attr, char *buf, \
+		const struct bin_attribute *attr, char *buf, \
 		loff_t off, size_t count) \
 { \
 	return isku_sysfs_read(fp, kobj, buf, off, count, \
@@ -178,27 +178,27 @@ ISKU_SYSFS_W(thingy, THINGY)
 
 #define ISKU_BIN_ATTR_RW(thingy, THINGY) \
 ISKU_SYSFS_RW(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
 	.attr = { .name = #thingy, .mode = 0660 }, \
 	.size = ISKU_SIZE_ ## THINGY, \
-	.read = isku_sysfs_read_ ## thingy, \
-	.write = isku_sysfs_write_ ## thingy \
+	.read_new = isku_sysfs_read_ ## thingy, \
+	.write_new = isku_sysfs_write_ ## thingy \
 }
 
 #define ISKU_BIN_ATTR_R(thingy, THINGY) \
 ISKU_SYSFS_R(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
 	.attr = { .name = #thingy, .mode = 0440 }, \
 	.size = ISKU_SIZE_ ## THINGY, \
-	.read = isku_sysfs_read_ ## thingy, \
+	.read_new = isku_sysfs_read_ ## thingy, \
 }
 
 #define ISKU_BIN_ATTR_W(thingy, THINGY) \
 ISKU_SYSFS_W(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
 	.attr = { .name = #thingy, .mode = 0220 }, \
 	.size = ISKU_SIZE_ ## THINGY, \
-	.write = isku_sysfs_write_ ## thingy \
+	.write_new = isku_sysfs_write_ ## thingy \
 }
 
 ISKU_BIN_ATTR_RW(macro, MACRO);
@@ -217,7 +217,7 @@ ISKU_BIN_ATTR_W(control, CONTROL);
 ISKU_BIN_ATTR_W(reset, RESET);
 ISKU_BIN_ATTR_R(info, INFO);
 
-static struct bin_attribute *isku_bin_attributes[] = {
+static const struct bin_attribute *const isku_bin_attributes[] = {
 	&bin_attr_macro,
 	&bin_attr_keys_function,
 	&bin_attr_keys_easyzone,
@@ -238,7 +238,7 @@ static struct bin_attribute *isku_bin_attributes[] = {
 
 static const struct attribute_group isku_group = {
 	.attrs = isku_attrs,
-	.bin_attrs = isku_bin_attributes,
+	.bin_attrs_new = isku_bin_attributes,
 };
 
 static const struct attribute_group *isku_groups[] = {

-- 
2.47.1