linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / powerpc / kernel / sysfs.c

diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index fec228c..0f0c3a9 100644 (file)
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -1,3 +1,4 @@
+#include <linux/config.h>
 #include <linux/sysdev.h>
 #include <linux/cpu.h>
 #include <linux/smp.h>
@@ -64,20 +65,20 @@ static int __init smt_setup(void)
        unsigned int cpu;
 
        if (!cpu_has_feature(CPU_FTR_SMT))
-               return -ENODEV;
+               return 1;
 
        options = find_path_device("/options");
        if (!options)
-               return -ENODEV;
+               return 1;
 
        val = (unsigned int *)get_property(options, "ibm,smt-snooze-delay",
                                           NULL);
        if (!smt_snooze_cmdline && val) {
-               for_each_possible_cpu(cpu)
+               for_each_cpu(cpu)
                        per_cpu(smt_snooze_delay, cpu) = *val;
        }
 
-       return 0;
+       return 1;
 }
 __initcall(smt_setup);
 
@@ -92,7 +93,7 @@ static int __init setup_smt_snooze_delay(char *str)
        smt_snooze_cmdline = 1;
 
        if (get_option(&str, &snooze)) {
-               for_each_possible_cpu(cpu)
+               for_each_cpu(cpu)
                        per_cpu(smt_snooze_delay, cpu) = snooze;
        }
 
@@ -278,7 +279,7 @@ static void unregister_cpu_online(unsigned int cpu)
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
+static int __devinit sysfs_cpu_notify(struct notifier_block *self,
                                      unsigned long action, void *hcpu)
 {
        unsigned int cpu = (unsigned int)(long)hcpu;
@@ -296,45 +297,38 @@ static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
        return NOTIFY_OK;
 }
 
-static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
+static struct notifier_block __devinitdata sysfs_cpu_nb = {
        .notifier_call  = sysfs_cpu_notify,
 };
 
 /* NUMA stuff */
 
 #ifdef CONFIG_NUMA
+static struct node node_devices[MAX_NUMNODES];
+
 static void register_nodes(void)
 {
        int i;
 
-       for (i = 0; i < MAX_NUMNODES; i++)
-               register_one_node(i);
-}
+       for (i = 0; i < MAX_NUMNODES; i++) {
+               if (node_online(i)) {
+                       int p_node = parent_node(i);
+                       struct node *parent = NULL;
 
-int sysfs_add_device_to_node(struct sys_device *dev, int nid)
-{
-       struct node *node = &node_devices[nid];
-       return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
-                       kobject_name(&dev->kobj));
-}
+                       if (p_node != i)
+                               parent = &node_devices[p_node];
 
-void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
-{
-       struct node *node = &node_devices[nid];
-       sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
+                       register_node(&node_devices[i], i, parent);
+               }
+       }
 }
-
 #else
 static void register_nodes(void)
 {
        return;
 }
-
 #endif
 
-EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
-EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
-
 /* Only valid if CPU is present. */
 static ssize_t show_physical_id(struct sys_device *dev, char *buf)
 {
@@ -347,13 +341,23 @@ static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
 static int __init topology_init(void)
 {
        int cpu;
+       struct node *parent = NULL;
 
        register_nodes();
+
        register_cpu_notifier(&sysfs_cpu_nb);
 
-       for_each_possible_cpu(cpu) {
+       for_each_cpu(cpu) {
                struct cpu *c = &per_cpu(cpu_devices, cpu);
 
+#ifdef CONFIG_NUMA
+               /* The node to which a cpu belongs can't be known
+                * until the cpu is made present.
+                */
+               parent = NULL;
+               if (cpu_present(cpu))
+                       parent = &node_devices[cpu_to_node(cpu)];
+#endif
                /*
                 * For now, we just see if the system supports making
                 * the RTAS calls for CPU hotplug.  But, there may be a
@@ -365,7 +369,7 @@ static int __init topology_init(void)
                        c->no_control = 1;
 
                if (cpu_online(cpu) || (c->no_control == 0)) {
-                       register_cpu(c, cpu);
+                       register_cpu(c, cpu, parent);
 
                        sysdev_create_file(&c->sysdev, &attr_physical_id);
                }