X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fbase%2Fcpu.c;h=64f5d54f7edcee095ae8ead0a2f29d032ce546cd;hb=f04c3ca8a2677816af1c0ae7170c2e56ac5d7042;hp=4bef76a2f3f2a7611ff0dcbca79c8d774d7a7255;hpb=5c45bf279d378d436ce45825c0f136696c7b6109;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 4bef76a..64f5d54 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -5,6 +5,7 @@
 #include <linux/sysdev.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/sched.h>
 #include <linux/cpu.h>
 #include <linux/topology.h>
 #include <linux/device.h>
@@ -13,22 +14,23 @@
 #include "base.h"
 
 struct sysdev_class cpu_sysdev_class = {
-	set_kset_name("cpu"),
+	.name = "cpu",
 };
 EXPORT_SYMBOL(cpu_sysdev_class);
 
-static struct sys_device *cpu_sys_devices[NR_CPUS];
+static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices);
 
 #ifdef CONFIG_HOTPLUG_CPU
-static ssize_t show_online(struct sys_device *dev, char *buf)
+static ssize_t show_online(struct sys_device *dev, struct sysdev_attribute *attr,
+			   char *buf)
 {
 	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
 
 	return sprintf(buf, "%u\n", !!cpu_online(cpu->sysdev.id));
 }
 
-static ssize_t store_online(struct sys_device *dev, const char *buf,
-			    size_t count)
+static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribute *attr,
+				 const char *buf, size_t count)
 {
 	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
 	ssize_t ret;
@@ -52,9 +54,9 @@ static ssize_t store_online(struct sys_device *dev, const char *buf,
 		ret = count;
 	return ret;
 }
-static SYSDEV_ATTR(online, 0600, show_online, store_online);
+static SYSDEV_ATTR(online, 0644, show_online, store_online);
 
-static void __devinit register_cpu_control(struct cpu *cpu)
+static void __cpuinit register_cpu_control(struct cpu *cpu)
 {
 	sysdev_create_file(&cpu->sysdev, &attr_online);
 }
@@ -67,7 +69,7 @@ void unregister_cpu(struct cpu *cpu)
 	sysdev_remove_file(&cpu->sysdev, &attr_online);
 
 	sysdev_unregister(&cpu->sysdev);
-	cpu_sys_devices[logical_cpu] = NULL;
+	per_cpu(cpu_sys_devices, logical_cpu) = NULL;
 	return;
 }
 #else /* ... !CONFIG_HOTPLUG_CPU */
@@ -79,7 +81,8 @@ static inline void register_cpu_control(struct cpu *cpu)
 #ifdef CONFIG_KEXEC
 #include <linux/kexec.h>
 
-static ssize_t show_crash_notes(struct sys_device *dev, char *buf)
+static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute *attr,
+				char *buf)
 {
 	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
 	ssize_t rc;
@@ -102,14 +105,59 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
 #endif
 
 /*
- * register_cpu - Setup a driverfs device for a CPU.
- * @cpu - Callers can set the cpu->no_control field to 1, to indicate not to
- *		  generate a control file in sysfs for this CPU.
+ * Print cpu online, possible, present, and system maps
+ */
+static ssize_t print_cpus_map(char *buf, cpumask_t *map)
+{
+	int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *map);
+
+	buf[n++] = '\n';
+	buf[n] = '\0';
+	return n;
+}
+
+#define	print_cpus_func(type) \
+static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf)	\
+{									\
+	return print_cpus_map(buf, &cpu_##type##_map);			\
+}									\
+static struct sysdev_class_attribute attr_##type##_map = 		\
+	_SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL)
+
+print_cpus_func(online);
+print_cpus_func(possible);
+print_cpus_func(present);
+
+static struct sysdev_class_attribute *cpu_state_attr[] = {
+	&attr_online_map,
+	&attr_possible_map,
+	&attr_present_map,
+};
+
+static int cpu_states_init(void)
+{
+	int i;
+	int err = 0;
+
+	for (i = 0;  i < ARRAY_SIZE(cpu_state_attr); i++) {
+		int ret;
+		ret = sysdev_class_create_file(&cpu_sysdev_class,
+						cpu_state_attr[i]);
+		if (!err)
+			err = ret;
+	}
+	return err;
+}
+
+/*
+ * register_cpu - Setup a sysfs device for a CPU.
+ * @cpu - cpu->hotpluggable field set to 1 will generate a control file in
+ *	  sysfs for this CPU.
  * @num - CPU number to use when creating the device.
  *
  * Initialize and register the CPU device.
  */
-int __devinit register_cpu(struct cpu *cpu, int num)
+int __cpuinit register_cpu(struct cpu *cpu, int num)
 {
 	int error;
 	cpu->node_id = cpu_to_node(num);
@@ -118,10 +166,10 @@ int __devinit register_cpu(struct cpu *cpu, int num)
 
 	error = sysdev_register(&cpu->sysdev);
 
-	if (!error && !cpu->no_control)
+	if (!error && cpu->hotpluggable)
 		register_cpu_control(cpu);
 	if (!error)
-		cpu_sys_devices[num] = &cpu->sysdev;
+		per_cpu(cpu_sys_devices, num) = &cpu->sysdev;
 	if (!error)
 		register_cpu_under_node(num, cpu_to_node(num));
 
@@ -134,8 +182,8 @@ int __devinit register_cpu(struct cpu *cpu, int num)
 
 struct sys_device *get_cpu_sysdev(unsigned cpu)
 {
-	if (cpu < NR_CPUS)
-		return cpu_sys_devices[cpu];
+	if (cpu < nr_cpu_ids && cpu_possible(cpu))
+		return per_cpu(cpu_sys_devices, cpu);
 	else
 		return NULL;
 }
@@ -146,6 +194,9 @@ int __init cpu_dev_init(void)
 	int err;
 
 	err = sysdev_class_register(&cpu_sysdev_class);
+	if (!err)
+		err = cpu_states_init();
+
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
 	if (!err)
 		err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);