w1: ds2805: 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-v1-11-c4befd2aa7cc@weissschuh.net
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

diff --git a/drivers/w1/slaves/w1_ds2805.c b/drivers/w1/slaves/w1_ds2805.c
index 4c1a2c51531779b2a10e136e25309171e697d89f..6ee895640d4ac781281e48ed01d9cb20cb71637c 100644 (file)
--- a/drivers/w1/slaves/w1_ds2805.c
+++ b/drivers/w1/slaves/w1_ds2805.c
@@ -92,7 +92,7 @@ static int w1_f0d_readblock(struct w1_slave *sl, int off, int count, char *buf)
 }
 
 static ssize_t w1_f0d_read_bin(struct file *filp, struct kobject *kobj,
-                              struct bin_attribute *bin_attr,
+                              const struct bin_attribute *bin_attr,
                               char *buf, loff_t off, size_t count)
 {
        struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -200,7 +200,7 @@ retry:
 }
 
 static ssize_t w1_f0d_write_bin(struct file *filp, struct kobject *kobj,
-                               struct bin_attribute *bin_attr,
+                               const struct bin_attribute *bin_attr,
                                char *buf, loff_t off, size_t count)
 {
        struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -261,14 +261,14 @@ out_up:
        return count;
 }
 
-static struct bin_attribute w1_f0d_bin_attr = {
+static const struct bin_attribute w1_f0d_bin_attr = {
        .attr = {
                .name = "eeprom",
                .mode = 0644,
        },
        .size = W1_F0D_EEPROM_SIZE,
-       .read = w1_f0d_read_bin,
-       .write = w1_f0d_write_bin,
+       .read_new = w1_f0d_read_bin,
+       .write_new = w1_f0d_write_bin,
 };
 
 static int w1_f0d_add_slave(struct w1_slave *sl)