w1: Constify 'struct bin_attribute'

JIRA: https://issues.redhat.com/browse/RHEL-116876

commit 699e5f2
Author: Thomas Weißschuh <linux@weissschuh.net>
Date:   Wed Dec 11 18:50:16 2024 +0100

    w1: 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@weissschuh.net>
    Link: https://lore.kernel.org/r/20241211-sysfs-const-bin_attr-w1-v1-1-c4befd2aa7cc@weissschuh.net
    Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>

Author: anushasrivats

drivers/w1/w1.c

@@ -111,7 +111,7 @@ ATTRIBUTE_GROUPS(w1_slave);
 /* Default family */
 
 static ssize_t rw_write(struct file *filp, struct kobject *kobj,
-			struct bin_attribute *bin_attr, char *buf, loff_t off,
+			const struct bin_attribute *bin_attr, char *buf, loff_t off,
 			size_t count)
 {
 	struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -130,8 +130,8 @@ static ssize_t rw_write(struct file *filp, struct kobject *kobj,
 }
 
 static ssize_t rw_read(struct file *filp, struct kobject *kobj,
-		       struct bin_attribute *bin_attr, char *buf, loff_t off,
-		       size_t count)
+		       const struct bin_attribute *bin_attr, char *buf,
+		       loff_t off, size_t count)
 {
 	struct w1_slave *sl = kobj_to_w1_slave(kobj);
 
@@ -141,15 +141,15 @@ static ssize_t rw_read(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static BIN_ATTR_RW(rw, PAGE_SIZE);
+static const BIN_ATTR_RW(rw, PAGE_SIZE);
 
-static struct bin_attribute *w1_slave_bin_attrs[] = {
+static const struct bin_attribute *const w1_slave_bin_attrs[] = {
 	&bin_attr_rw,
 	NULL,
 };
 
 static const struct attribute_group w1_slave_default_group = {
-	.bin_attrs = w1_slave_bin_attrs,
+	.bin_attrs_new = w1_slave_bin_attrs,
 };
 
 static const struct attribute_group *w1_slave_default_groups[] = {