sysdev: Convert node driver class attributes to be data driven

Using the new attribute argument convert the node driver class
attributes to carry the node state. Then use a shared function to do
what a lot of individual functions did before.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 85c9d30..aa8bc4b 100644 (file)
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -544,59 +544,29 @@ static ssize_t print_nodes_state(enum node_states state, char *buf)
        return n;
 }
 
-static ssize_t print_nodes_possible(struct sysdev_class *class,
-                                   struct sysdev_class_attribute *attr, char *buf)
-{
-       return print_nodes_state(N_POSSIBLE, buf);
-}
-
-static ssize_t print_nodes_online(struct sysdev_class *class,
-                                 struct sysdev_class_attribute *attr,
-                                 char *buf)
-{
-       return print_nodes_state(N_ONLINE, buf);
-}
-
-static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class,
-                                            struct sysdev_class_attribute *attr,
-                                            char *buf)
-{
-       return print_nodes_state(N_NORMAL_MEMORY, buf);
-}
-
-static ssize_t print_nodes_has_cpu(struct sysdev_class *class,
-                                  struct sysdev_class_attribute *attr,
-                                  char *buf)
-{
-       return print_nodes_state(N_CPU, buf);
-}
-
-static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL);
-static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL);
-static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory,
-                                                                       NULL);
-static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL);
+struct node_attr {
+       struct sysdev_class_attribute attr;
+       enum node_states state;
+};
 
-#ifdef CONFIG_HIGHMEM
-static ssize_t print_nodes_has_high_memory(struct sysdev_class *class,
-                                          struct sysdev_class_attribute *attr,
-                                          char *buf)
+static ssize_t show_node_state(struct sysdev_class *class,
+                              struct sysdev_class_attribute *attr, char *buf)
 {
-       return print_nodes_state(N_HIGH_MEMORY, buf);
+       struct node_attr *na = container_of(attr, struct node_attr, attr);
+       return print_nodes_state(na->state, buf);
 }
 
-static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory,
-                                                                        NULL);
-#endif
+#define _NODE_ATTR(name, state) \
+       { _SYSDEV_CLASS_ATTR(name, 0444, show_node_state, NULL), state }
 
-struct sysdev_class_attribute *node_state_attr[] = {
-       &attr_possible,
-       &attr_online,
-       &attr_has_normal_memory,
+static struct node_attr node_state_attr[] = {
+       _NODE_ATTR(possible, N_POSSIBLE),
+       _NODE_ATTR(online, N_ONLINE),
+       _NODE_ATTR(has_normal_memory, N_NORMAL_MEMORY),
+       _NODE_ATTR(has_cpu, N_CPU),
 #ifdef CONFIG_HIGHMEM
-       &attr_has_high_memory,
+       _NODE_ATTR(has_high_memory, N_HIGH_MEMORY),
 #endif
-       &attr_has_cpu,
 };
 
 static int node_states_init(void)
@@ -604,9 +574,10 @@ static int node_states_init(void)
        int i;
        int err = 0;
 
+       BUILD_BUG_ON(ARRAY_SIZE(node_state_attr) != NR_NODE_STATES);
        for (i = 0;  i < NR_NODE_STATES; i++) {
                int ret;
-               ret = sysdev_class_create_file(&node_class, node_state_attr[i]);
+               ret = sysdev_class_create_file(&node_class, &node_state_attr[i].attr);
                if (!err)
                        err = ret;
        }