cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem

This moves the 'cpu sysdev_class' over to a regular 'cpu' subsystem
and converts the devices to regular devices. The sysdev drivers are
implemented as subsystem interfaces now.

After all sysdev classes are ported to regular driver core entities, the
sysdev implementation will be entirely removed from the kernel.

Userspace relies on events and generic sysfs subsystem infrastructure
from sysdev devices, which are made available with this conversion.

Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@amd64.org>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Cc: Len Brown <lenb@kernel.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 30 insertions, 31 deletions

diff --git a/arch/tile/kernel/sysfs.c b/arch/tile/kernel/sysfs.c
index b671a86f4515..e7ce2a5161b8 100644
--- a/arch/tile/kernel/sysfs.c
+++ b/arch/tile/kernel/sysfs.c
@@ -14,7 +14,7 @@
  * /sys entry support.
  */
 
-#include <linux/sysdev.h>
+#include <linux/device.h>
 #include <linux/cpu.h>
 #include <linux/slab.h>
 #include <linux/smp.h>
@@ -31,55 +31,55 @@ static ssize_t get_hv_confstr(char *page, int query)
 	return n;
 }
 
-static ssize_t chip_width_show(struct sysdev_class *dev,
-			       struct sysdev_class_attribute *attr,
+static ssize_t chip_width_show(struct device *dev,
+			       struct device_attribute *attr,
 			       char *page)
 {
 	return sprintf(page, "%u\n", smp_width);
 }
-static SYSDEV_CLASS_ATTR(chip_width, 0444, chip_width_show, NULL);
+static DEVICE_ATTR(chip_width, 0444, chip_width_show, NULL);
 
-static ssize_t chip_height_show(struct sysdev_class *dev,
-				struct sysdev_class_attribute *attr,
+static ssize_t chip_height_show(struct device *dev,
+				struct device_attribute *attr,
 				char *page)
 {
 	return sprintf(page, "%u\n", smp_height);
 }
-static SYSDEV_CLASS_ATTR(chip_height, 0444, chip_height_show, NULL);
+static DEVICE_ATTR(chip_height, 0444, chip_height_show, NULL);
 
-static ssize_t chip_serial_show(struct sysdev_class *dev,
-				struct sysdev_class_attribute *attr,
+static ssize_t chip_serial_show(struct device *dev,
+				struct device_attribute *attr,
 				char *page)
 {
 	return get_hv_confstr(page, HV_CONFSTR_CHIP_SERIAL_NUM);
 }
-static SYSDEV_CLASS_ATTR(chip_serial, 0444, chip_serial_show, NULL);
+static DEVICE_ATTR(chip_serial, 0444, chip_serial_show, NULL);
 
-static ssize_t chip_revision_show(struct sysdev_class *dev,
-				  struct sysdev_class_attribute *attr,
+static ssize_t chip_revision_show(struct device *dev,
+				  struct device_attribute *attr,
 				  char *page)
 {
 	return get_hv_confstr(page, HV_CONFSTR_CHIP_REV);
 }
-static SYSDEV_CLASS_ATTR(chip_revision, 0444, chip_revision_show, NULL);
+static DEVICE_ATTR(chip_revision, 0444, chip_revision_show, NULL);
 
 
-static ssize_t type_show(struct sysdev_class *dev,
-			    struct sysdev_class_attribute *attr,
+static ssize_t type_show(struct device *dev,
+			    struct device_attribute *attr,
 			    char *page)
 {
 	return sprintf(page, "tilera\n");
 }
-static SYSDEV_CLASS_ATTR(type, 0444, type_show, NULL);
+static DEVICE_ATTR(type, 0444, type_show, NULL);
 
 #define HV_CONF_ATTR(name, conf)					\
-	static ssize_t name ## _show(struct sysdev_class *dev,		\
-				     struct sysdev_class_attribute *attr, \
+	static ssize_t name ## _show(struct device *dev,		\
+				     struct device_attribute *attr, \
 				     char *page)			\
 	{								\
 		return get_hv_confstr(page, conf);			\
 	}								\
-	static SYSDEV_CLASS_ATTR(name, 0444, name ## _show, NULL);
+	static DEVICE_ATTR(name, 0444, name ## _show, NULL);
 
 HV_CONF_ATTR(version,		HV_CONFSTR_HV_SW_VER)
 HV_CONF_ATTR(config_version,	HV_CONFSTR_HV_CONFIG_VER)
@@ -95,15 +95,15 @@ HV_CONF_ATTR(mezz_description,	HV_CONFSTR_MEZZ_DESC)
 HV_CONF_ATTR(switch_control,	HV_CONFSTR_SWITCH_CONTROL)
 
 static struct attribute *board_attrs[] = {
-	&attr_board_part.attr,
-	&attr_board_serial.attr,
-	&attr_board_revision.attr,
-	&attr_board_description.attr,
-	&attr_mezz_part.attr,
-	&attr_mezz_serial.attr,
-	&attr_mezz_revision.attr,
-	&attr_mezz_description.attr,
-	&attr_switch_control.attr,
+	&dev_attr_board_part.attr,
+	&dev_attr_board_serial.attr,
+	&dev_attr_board_revision.attr,
+	&dev_attr_board_description.attr,
+	&dev_attr_mezz_part.attr,
+	&dev_attr_mezz_serial.attr,
+	&dev_attr_mezz_revision.attr,
+	&dev_attr_mezz_description.attr,
+	&dev_attr_switch_control.attr,
 	NULL
 };
 
@@ -150,12 +150,11 @@ hvconfig_bin_read(struct file *filp, struct kobject *kobj,
 
 static int __init create_sysfs_entries(void)
 {
-	struct sysdev_class *cls = &cpu_sysdev_class;
 	int err = 0;
 
 #define create_cpu_attr(name)						\
 	if (!err)							\
-		err = sysfs_create_file(&cls->kset.kobj, &attr_##name.attr);
+		err = device_create_file(cpu_subsys.dev_root, &dev_attr_##name);
 	create_cpu_attr(chip_width);
 	create_cpu_attr(chip_height);
 	create_cpu_attr(chip_serial);
@@ -163,7 +162,7 @@ static int __init create_sysfs_entries(void)
 
 #define create_hv_attr(name)						\
 	if (!err)							\
-		err = sysfs_create_file(hypervisor_kobj, &attr_##name.attr);
+		err = sysfs_create_file(hypervisor_kobj, &dev_attr_##name);
 	create_hv_attr(type);
 	create_hv_attr(version);
 	create_hv_attr(config_version);