hwmon: (occ/p9_sbe) 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 <[email protected]>
Link: https://lore.kernel.org/r/20241215-sysfs-const-bin_attr-hwmon-v1-1-ea72a6a46c36@weissschuh.net
Signed-off-by: Guenter Roeck <[email protected]>

Author: t-8ch

drivers/hwmon/occ/p9_sbe.c

@@ -30,7 +30,7 @@ struct p9_sbe_occ {
 #define to_p9_sbe_occ(x)	container_of((x), struct p9_sbe_occ, occ)
 
 static ssize_t ffdc_read(struct file *filp, struct kobject *kobj,
-			 struct bin_attribute *battr, char *buf, loff_t pos,
+			 const struct bin_attribute *battr, char *buf, loff_t pos,
 			 size_t count)
 {
 	ssize_t rc = 0;
@@ -48,7 +48,7 @@ static ssize_t ffdc_read(struct file *filp, struct kobject *kobj,
 
 	return rc;
 }
-static BIN_ATTR_RO(ffdc, OCC_MAX_RESP_WORDS * 4);
+static const BIN_ATTR_RO(ffdc, OCC_MAX_RESP_WORDS * 4);
 
 static bool p9_sbe_occ_save_ffdc(struct p9_sbe_occ *ctx, const void *resp,
 				 size_t resp_len)