xen-balloon: convert sysdev_class to a regular subsystem
After all sysdev classes are ported to regular driver core entities, the sysdev implementation will be entirely removed from the kernel. Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
Greg Kroah-Hartman
parent
d369a5d8fc
commit
0706802183
3 changed files with 83 additions and 84 deletions
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@ -32,7 +32,6 @@
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sysdev.h>
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#include <linux/capability.h>
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#include <xen/xen.h>
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@ -46,9 +45,9 @@
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#define BALLOON_CLASS_NAME "xen_memory"
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static struct sys_device balloon_sysdev;
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static struct device balloon_dev;
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static int register_balloon(struct sys_device *sysdev);
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static int register_balloon(struct device *dev);
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/* React to a change in the target key */
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static void watch_target(struct xenbus_watch *watch,
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@ -98,9 +97,9 @@ static int __init balloon_init(void)
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pr_info("xen-balloon: Initialising balloon driver.\n");
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register_balloon(&balloon_sysdev);
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register_balloon(&balloon_dev);
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register_xen_selfballooning(&balloon_sysdev);
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register_xen_selfballooning(&balloon_dev);
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register_xenstore_notifier(&xenstore_notifier);
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@ -117,31 +116,31 @@ static void balloon_exit(void)
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module_exit(balloon_exit);
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#define BALLOON_SHOW(name, format, args...) \
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static ssize_t show_##name(struct sys_device *dev, \
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struct sysdev_attribute *attr, \
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static ssize_t show_##name(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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return sprintf(buf, format, ##args); \
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} \
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static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
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static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
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BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages));
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BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_low));
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BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_high));
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static SYSDEV_ULONG_ATTR(schedule_delay, 0444, balloon_stats.schedule_delay);
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static SYSDEV_ULONG_ATTR(max_schedule_delay, 0644, balloon_stats.max_schedule_delay);
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static SYSDEV_ULONG_ATTR(retry_count, 0444, balloon_stats.retry_count);
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static SYSDEV_ULONG_ATTR(max_retry_count, 0644, balloon_stats.max_retry_count);
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static DEVICE_ULONG_ATTR(schedule_delay, 0444, balloon_stats.schedule_delay);
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static DEVICE_ULONG_ATTR(max_schedule_delay, 0644, balloon_stats.max_schedule_delay);
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static DEVICE_ULONG_ATTR(retry_count, 0444, balloon_stats.retry_count);
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static DEVICE_ULONG_ATTR(max_retry_count, 0644, balloon_stats.max_retry_count);
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static ssize_t show_target_kb(struct sys_device *dev, struct sysdev_attribute *attr,
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static ssize_t show_target_kb(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%lu\n", PAGES2KB(balloon_stats.target_pages));
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}
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static ssize_t store_target_kb(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_target_kb(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -158,11 +157,11 @@ static ssize_t store_target_kb(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(target_kb, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(target_kb, S_IRUGO | S_IWUSR,
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show_target_kb, store_target_kb);
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static ssize_t show_target(struct sys_device *dev, struct sysdev_attribute *attr,
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static ssize_t show_target(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%llu\n",
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@ -170,8 +169,8 @@ static ssize_t show_target(struct sys_device *dev, struct sysdev_attribute *attr
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<< PAGE_SHIFT);
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}
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static ssize_t store_target(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_target(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -188,23 +187,23 @@ static ssize_t store_target(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(target, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(target, S_IRUGO | S_IWUSR,
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show_target, store_target);
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static struct sysdev_attribute *balloon_attrs[] = {
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&attr_target_kb,
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&attr_target,
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&attr_schedule_delay.attr,
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&attr_max_schedule_delay.attr,
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&attr_retry_count.attr,
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&attr_max_retry_count.attr
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static struct device_attribute *balloon_attrs[] = {
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&dev_attr_target_kb,
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&dev_attr_target,
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&dev_attr_schedule_delay.attr,
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&dev_attr_max_schedule_delay.attr,
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&dev_attr_retry_count.attr,
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&dev_attr_max_retry_count.attr
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};
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static struct attribute *balloon_info_attrs[] = {
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&attr_current_kb.attr,
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&attr_low_kb.attr,
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&attr_high_kb.attr,
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&dev_attr_current_kb.attr,
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&dev_attr_low_kb.attr,
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&dev_attr_high_kb.attr,
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NULL
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};
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@ -213,34 +212,35 @@ static struct attribute_group balloon_info_group = {
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.attrs = balloon_info_attrs
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};
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static struct sysdev_class balloon_sysdev_class = {
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.name = BALLOON_CLASS_NAME
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static struct bus_type balloon_subsys = {
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.name = BALLOON_CLASS_NAME,
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.dev_name = BALLOON_CLASS_NAME,
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};
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static int register_balloon(struct sys_device *sysdev)
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static int register_balloon(struct device *dev)
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{
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int i, error;
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error = sysdev_class_register(&balloon_sysdev_class);
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error = bus_register(&balloon_subsys);
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if (error)
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return error;
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sysdev->id = 0;
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sysdev->cls = &balloon_sysdev_class;
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dev->id = 0;
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dev->bus = &balloon_subsys;
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error = sysdev_register(sysdev);
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error = device_register(dev);
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if (error) {
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sysdev_class_unregister(&balloon_sysdev_class);
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bus_unregister(&balloon_subsys);
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return error;
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}
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for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++) {
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error = sysdev_create_file(sysdev, balloon_attrs[i]);
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error = device_create_file(dev, balloon_attrs[i]);
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if (error)
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goto fail;
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}
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error = sysfs_create_group(&sysdev->kobj, &balloon_info_group);
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error = sysfs_create_group(&dev->kobj, &balloon_info_group);
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if (error)
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goto fail;
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@ -248,9 +248,9 @@ static int register_balloon(struct sys_device *sysdev)
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fail:
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while (--i >= 0)
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sysdev_remove_file(sysdev, balloon_attrs[i]);
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sysdev_unregister(sysdev);
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sysdev_class_unregister(&balloon_sysdev_class);
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device_remove_file(dev, balloon_attrs[i]);
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device_unregister(dev);
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bus_unregister(&balloon_subsys);
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return error;
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}
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@ -266,21 +266,20 @@ static void selfballoon_process(struct work_struct *work)
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#ifdef CONFIG_SYSFS
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#include <linux/sysdev.h>
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#include <linux/capability.h>
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#define SELFBALLOON_SHOW(name, format, args...) \
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static ssize_t show_##name(struct sys_device *dev, \
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struct sysdev_attribute *attr, \
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char *buf) \
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static ssize_t show_##name(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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return sprintf(buf, format, ##args); \
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}
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SELFBALLOON_SHOW(selfballooning, "%d\n", xen_selfballooning_enabled);
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static ssize_t store_selfballooning(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_selfballooning(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -303,13 +302,13 @@ static ssize_t store_selfballooning(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(selfballooning, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(selfballooning, S_IRUGO | S_IWUSR,
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show_selfballooning, store_selfballooning);
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SELFBALLOON_SHOW(selfballoon_interval, "%d\n", selfballoon_interval);
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static ssize_t store_selfballoon_interval(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_selfballoon_interval(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -325,13 +324,13 @@ static ssize_t store_selfballoon_interval(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(selfballoon_interval, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(selfballoon_interval, S_IRUGO | S_IWUSR,
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show_selfballoon_interval, store_selfballoon_interval);
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SELFBALLOON_SHOW(selfballoon_downhys, "%d\n", selfballoon_downhysteresis);
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static ssize_t store_selfballoon_downhys(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_selfballoon_downhys(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -347,14 +346,14 @@ static ssize_t store_selfballoon_downhys(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(selfballoon_downhysteresis, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(selfballoon_downhysteresis, S_IRUGO | S_IWUSR,
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show_selfballoon_downhys, store_selfballoon_downhys);
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SELFBALLOON_SHOW(selfballoon_uphys, "%d\n", selfballoon_uphysteresis);
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static ssize_t store_selfballoon_uphys(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_selfballoon_uphys(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -370,14 +369,14 @@ static ssize_t store_selfballoon_uphys(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(selfballoon_uphysteresis, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(selfballoon_uphysteresis, S_IRUGO | S_IWUSR,
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show_selfballoon_uphys, store_selfballoon_uphys);
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SELFBALLOON_SHOW(selfballoon_min_usable_mb, "%d\n",
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selfballoon_min_usable_mb);
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static ssize_t store_selfballoon_min_usable_mb(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_selfballoon_min_usable_mb(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -393,7 +392,7 @@ static ssize_t store_selfballoon_min_usable_mb(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(selfballoon_min_usable_mb, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(selfballoon_min_usable_mb, S_IRUGO | S_IWUSR,
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show_selfballoon_min_usable_mb,
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store_selfballoon_min_usable_mb);
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@ -401,8 +400,8 @@ static SYSDEV_ATTR(selfballoon_min_usable_mb, S_IRUGO | S_IWUSR,
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#ifdef CONFIG_FRONTSWAP
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SELFBALLOON_SHOW(frontswap_selfshrinking, "%d\n", frontswap_selfshrinking);
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static ssize_t store_frontswap_selfshrinking(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_frontswap_selfshrinking(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -424,13 +423,13 @@ static ssize_t store_frontswap_selfshrinking(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(frontswap_selfshrinking, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(frontswap_selfshrinking, S_IRUGO | S_IWUSR,
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show_frontswap_selfshrinking, store_frontswap_selfshrinking);
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SELFBALLOON_SHOW(frontswap_inertia, "%d\n", frontswap_inertia);
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static ssize_t store_frontswap_inertia(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_frontswap_inertia(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -447,13 +446,13 @@ static ssize_t store_frontswap_inertia(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(frontswap_inertia, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(frontswap_inertia, S_IRUGO | S_IWUSR,
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show_frontswap_inertia, store_frontswap_inertia);
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SELFBALLOON_SHOW(frontswap_hysteresis, "%d\n", frontswap_hysteresis);
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static ssize_t store_frontswap_hysteresis(struct sys_device *dev,
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struct sysdev_attribute *attr,
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static ssize_t store_frontswap_hysteresis(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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@ -469,21 +468,21 @@ static ssize_t store_frontswap_hysteresis(struct sys_device *dev,
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return count;
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}
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static SYSDEV_ATTR(frontswap_hysteresis, S_IRUGO | S_IWUSR,
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static DEVICE_ATTR(frontswap_hysteresis, S_IRUGO | S_IWUSR,
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show_frontswap_hysteresis, store_frontswap_hysteresis);
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#endif /* CONFIG_FRONTSWAP */
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static struct attribute *selfballoon_attrs[] = {
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&attr_selfballooning.attr,
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&attr_selfballoon_interval.attr,
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&attr_selfballoon_downhysteresis.attr,
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&attr_selfballoon_uphysteresis.attr,
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&attr_selfballoon_min_usable_mb.attr,
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&dev_attr_selfballooning.attr,
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&dev_attr_selfballoon_interval.attr,
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&dev_attr_selfballoon_downhysteresis.attr,
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&dev_attr_selfballoon_uphysteresis.attr,
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&dev_attr_selfballoon_min_usable_mb.attr,
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#ifdef CONFIG_FRONTSWAP
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&attr_frontswap_selfshrinking.attr,
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&attr_frontswap_hysteresis.attr,
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&attr_frontswap_inertia.attr,
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&dev_attr_frontswap_selfshrinking.attr,
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&dev_attr_frontswap_hysteresis.attr,
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&dev_attr_frontswap_inertia.attr,
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#endif
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NULL
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};
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@ -494,12 +493,12 @@ static struct attribute_group selfballoon_group = {
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};
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#endif
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int register_xen_selfballooning(struct sys_device *sysdev)
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int register_xen_selfballooning(struct device *dev)
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{
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int error = -1;
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#ifdef CONFIG_SYSFS
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error = sysfs_create_group(&sysdev->kobj, &selfballoon_group);
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error = sysfs_create_group(&dev->kobj, &selfballoon_group);
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#endif
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return error;
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}
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@ -29,11 +29,11 @@ int alloc_xenballooned_pages(int nr_pages, struct page **pages,
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bool highmem);
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void free_xenballooned_pages(int nr_pages, struct page **pages);
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struct sys_device;
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struct device;
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#ifdef CONFIG_XEN_SELFBALLOONING
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extern int register_xen_selfballooning(struct sys_device *sysdev);
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extern int register_xen_selfballooning(struct device *dev);
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#else
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static inline int register_xen_selfballooning(struct sys_device *sysdev)
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static inline int register_xen_selfballooning(struct device *dev)
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{
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return -ENOSYS;
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}
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