net: make queue attributes ro_after_init

The XPS queue attributes can be ro_after_init.
Also use __ATTR_RX macros to simplify initialization.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/net-sysfs.c

@@ -1010,8 +1010,7 @@ static const struct sysfs_ops netdev_queue_sysfs_ops = {
 	.store = netdev_queue_attr_store,
 };
 
-static ssize_t show_trans_timeout(struct netdev_queue *queue,
-				  char *buf)
+static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf)
 {
 	unsigned long trans_timeout;
 
@@ -1033,7 +1032,7 @@ static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
 	return i;
 }
 
-static ssize_t show_traffic_class(struct netdev_queue *queue,
+static ssize_t traffic_class_show(struct netdev_queue *queue,
 				  char *buf)
 {
 	struct net_device *dev = queue->dev;
@@ -1047,14 +1046,14 @@ static ssize_t show_traffic_class(struct netdev_queue *queue,
 }
 
 #ifdef CONFIG_XPS
-static ssize_t show_tx_maxrate(struct netdev_queue *queue,
+static ssize_t tx_maxrate_show(struct netdev_queue *queue,
 			       char *buf)
 {
 	return sprintf(buf, "%lu\n", queue->tx_maxrate);
 }
 
-static ssize_t set_tx_maxrate(struct netdev_queue *queue,
-			      const char *buf, size_t len)
+static ssize_t tx_maxrate_store(struct netdev_queue *queue,
+				const char *buf, size_t len)
 {
 	struct net_device *dev = queue->dev;
 	int err, index = get_netdev_queue_index(queue);
@@ -1079,16 +1078,15 @@ static ssize_t set_tx_maxrate(struct netdev_queue *queue,
 	return err;
 }
 
-static struct netdev_queue_attribute queue_tx_maxrate =
-	__ATTR(tx_maxrate, S_IRUGO | S_IWUSR,
-	       show_tx_maxrate, set_tx_maxrate);
+static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init
+	= __ATTR_RW(tx_maxrate);
 #endif
 
-static struct netdev_queue_attribute queue_trans_timeout =
-	__ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);
+static struct netdev_queue_attribute queue_trans_timeout __ro_after_init
+	= __ATTR_RO(tx_timeout);
 
-static struct netdev_queue_attribute queue_traffic_class =
-	__ATTR(traffic_class, S_IRUGO, show_traffic_class, NULL);
+static struct netdev_queue_attribute queue_traffic_class __ro_after_init
+	= __ATTR_RO(traffic_class);
 
 #ifdef CONFIG_BQL
 /*
@@ -1196,8 +1194,8 @@ static const struct attribute_group dql_group = {
 #endif /* CONFIG_BQL */
 
 #ifdef CONFIG_XPS
-static ssize_t show_xps_map(struct netdev_queue *queue,
-			    char *buf)
+static ssize_t xps_cpus_show(struct netdev_queue *queue,
+			     char *buf)
 {
 	struct net_device *dev = queue->dev;
 	int cpu, len, num_tc = 1, tc = 0;
@@ -1243,8 +1241,8 @@ static ssize_t show_xps_map(struct netdev_queue *queue,
 	return len < PAGE_SIZE ? len : -EINVAL;
 }
 
-static ssize_t store_xps_map(struct netdev_queue *queue,
-			     const char *buf, size_t len)
+static ssize_t xps_cpus_store(struct netdev_queue *queue,
+			      const char *buf, size_t len)
 {
 	struct net_device *dev = queue->dev;
 	unsigned long index;
@@ -1272,11 +1270,11 @@ static ssize_t store_xps_map(struct netdev_queue *queue,
 	return err ? : len;
 }
 
-static struct netdev_queue_attribute xps_cpus_attribute =
-    __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
+static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init
+	= __ATTR_RW(xps_cpus);
 #endif /* CONFIG_XPS */
 
-static struct attribute *netdev_queue_default_attrs[] = {
+static struct attribute *netdev_queue_default_attrs[] __ro_after_init = {
 	&queue_trans_timeout.attr,
 	&queue_traffic_class.attr,
 #ifdef CONFIG_XPS
@@ -1306,7 +1304,7 @@ static const void *netdev_queue_namespace(struct kobject *kobj)
 	return ns;
 }
 
-static struct kobj_type netdev_queue_ktype = {
+static struct kobj_type netdev_queue_ktype __ro_after_init = {
 	.sysfs_ops = &netdev_queue_sysfs_ops,
 	.release = netdev_queue_release,
 	.default_attrs = netdev_queue_default_attrs,