RDMA/qib: 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://patch.msgid.link/20250114-sysfs-const-bin_attr-infiniband-v1-2-397aaa94d453@weissschuh.net
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: t-8ch

drivers/infiniband/hw/qib/qib_sysfs.c

@@ -214,8 +214,8 @@ static const struct attribute_group port_linkcontrol_group = {
  * Congestion control table size followed by table entries
  */
 static ssize_t cc_table_bin_read(struct file *filp, struct kobject *kobj,
-				 struct bin_attribute *bin_attr, char *buf,
-				 loff_t pos, size_t count)
+				 const struct bin_attribute *bin_attr,
+				 char *buf, loff_t pos, size_t count)
 {
 	struct qib_pportdata *ppd = qib_get_pportdata_kobj(kobj);
 	int ret;
@@ -241,16 +241,16 @@ static ssize_t cc_table_bin_read(struct file *filp, struct kobject *kobj,
 
 	return count;
 }
-static BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
+static const BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
 
 /*
  * Congestion settings: port control, control map and an array of 16
  * entries for the congestion entries - increase, timer, event log
  * trigger threshold and the minimum injection rate delay.
  */
 static ssize_t cc_setting_bin_read(struct file *filp, struct kobject *kobj,
-				   struct bin_attribute *bin_attr, char *buf,
-				   loff_t pos, size_t count)
+				   const struct bin_attribute *bin_attr,
+				   char *buf, loff_t pos, size_t count)
 {
 	struct qib_pportdata *ppd = qib_get_pportdata_kobj(kobj);
 	int ret;
@@ -274,9 +274,9 @@ static ssize_t cc_setting_bin_read(struct file *filp, struct kobject *kobj,
 
 	return count;
 }
-static BIN_ATTR_RO(cc_setting_bin, PAGE_SIZE);
+static const BIN_ATTR_RO(cc_setting_bin, PAGE_SIZE);
 
-static struct bin_attribute *port_ccmgta_attributes[] = {
+static const struct bin_attribute *const port_ccmgta_attributes[] = {
 	&bin_attr_cc_setting_bin,
 	&bin_attr_cc_table_bin,
 	NULL,
@@ -295,7 +295,7 @@ static umode_t qib_ccmgta_is_bin_visible(struct kobject *kobj,
 static const struct attribute_group port_ccmgta_attribute_group = {
 	.name = "CCMgtA",
 	.is_bin_visible = qib_ccmgta_is_bin_visible,
-	.bin_attrs = port_ccmgta_attributes,
+	.bin_attrs_new = port_ccmgta_attributes,
 };
 
 /* Start sl2vl */