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Diffstat (limited to 'drivers/xen/xen-balloon.c')
-rw-r--r--drivers/xen/xen-balloon.c109
1 files changed, 56 insertions, 53 deletions
diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
index a4ff225ee86..e555845d61f 100644
--- a/drivers/xen/xen-balloon.c
+++ b/drivers/xen/xen-balloon.c
@@ -30,9 +30,10 @@
* IN THE SOFTWARE.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/sysdev.h>
#include <linux/capability.h>
#include <xen/xen.h>
@@ -46,14 +47,9 @@
#define BALLOON_CLASS_NAME "xen_memory"
-static struct sys_device balloon_sysdev;
-
-static int register_balloon(struct sys_device *sysdev);
+static struct device balloon_dev;
-static struct xenbus_watch target_watch =
-{
- .node = "memory/target"
-};
+static int register_balloon(struct device *dev);
/* React to a change in the target key */
static void watch_target(struct xenbus_watch *watch,
@@ -73,6 +69,11 @@ static void watch_target(struct xenbus_watch *watch,
*/
balloon_set_new_target(new_target >> (PAGE_SHIFT - 10));
}
+static struct xenbus_watch target_watch = {
+ .node = "memory/target",
+ .callback = watch_target,
+};
+
static int balloon_init_watcher(struct notifier_block *notifier,
unsigned long event,
@@ -82,24 +83,25 @@ static int balloon_init_watcher(struct notifier_block *notifier,
err = register_xenbus_watch(&target_watch);
if (err)
- printk(KERN_ERR "Failed to set balloon watcher\n");
+ pr_err("Failed to set balloon watcher\n");
return NOTIFY_DONE;
}
-static struct notifier_block xenstore_notifier;
+static struct notifier_block xenstore_notifier = {
+ .notifier_call = balloon_init_watcher,
+};
static int __init balloon_init(void)
{
if (!xen_domain())
return -ENODEV;
- pr_info("xen-balloon: Initialising balloon driver.\n");
+ pr_info("Initialising balloon driver\n");
- register_balloon(&balloon_sysdev);
+ register_balloon(&balloon_dev);
- target_watch.callback = watch_target;
- xenstore_notifier.notifier_call = balloon_init_watcher;
+ register_xen_selfballooning(&balloon_dev);
register_xenstore_notifier(&xenstore_notifier);
@@ -116,31 +118,31 @@ static void balloon_exit(void)
module_exit(balloon_exit);
#define BALLOON_SHOW(name, format, args...) \
- static ssize_t show_##name(struct sys_device *dev, \
- struct sysdev_attribute *attr, \
+ static ssize_t show_##name(struct device *dev, \
+ struct device_attribute *attr, \
char *buf) \
{ \
return sprintf(buf, format, ##args); \
} \
- static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
+ static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages));
BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_low));
BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_high));
-static SYSDEV_ULONG_ATTR(schedule_delay, 0444, balloon_stats.schedule_delay);
-static SYSDEV_ULONG_ATTR(max_schedule_delay, 0644, balloon_stats.max_schedule_delay);
-static SYSDEV_ULONG_ATTR(retry_count, 0444, balloon_stats.retry_count);
-static SYSDEV_ULONG_ATTR(max_retry_count, 0644, balloon_stats.max_retry_count);
+static DEVICE_ULONG_ATTR(schedule_delay, 0444, balloon_stats.schedule_delay);
+static DEVICE_ULONG_ATTR(max_schedule_delay, 0644, balloon_stats.max_schedule_delay);
+static DEVICE_ULONG_ATTR(retry_count, 0444, balloon_stats.retry_count);
+static DEVICE_ULONG_ATTR(max_retry_count, 0644, balloon_stats.max_retry_count);
-static ssize_t show_target_kb(struct sys_device *dev, struct sysdev_attribute *attr,
+static ssize_t show_target_kb(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%lu\n", PAGES2KB(balloon_stats.target_pages));
}
-static ssize_t store_target_kb(struct sys_device *dev,
- struct sysdev_attribute *attr,
+static ssize_t store_target_kb(struct device *dev,
+ struct device_attribute *attr,
const char *buf,
size_t count)
{
@@ -157,11 +159,11 @@ static ssize_t store_target_kb(struct sys_device *dev,
return count;
}
-static SYSDEV_ATTR(target_kb, S_IRUGO | S_IWUSR,
+static DEVICE_ATTR(target_kb, S_IRUGO | S_IWUSR,
show_target_kb, store_target_kb);
-static ssize_t show_target(struct sys_device *dev, struct sysdev_attribute *attr,
+static ssize_t show_target(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%llu\n",
@@ -169,8 +171,8 @@ static ssize_t show_target(struct sys_device *dev, struct sysdev_attribute *attr
<< PAGE_SHIFT);
}
-static ssize_t store_target(struct sys_device *dev,
- struct sysdev_attribute *attr,
+static ssize_t store_target(struct device *dev,
+ struct device_attribute *attr,
const char *buf,
size_t count)
{
@@ -187,59 +189,60 @@ static ssize_t store_target(struct sys_device *dev,
return count;
}
-static SYSDEV_ATTR(target, S_IRUGO | S_IWUSR,
+static DEVICE_ATTR(target, S_IRUGO | S_IWUSR,
show_target, store_target);
-static struct sysdev_attribute *balloon_attrs[] = {
- &attr_target_kb,
- &attr_target,
- &attr_schedule_delay.attr,
- &attr_max_schedule_delay.attr,
- &attr_retry_count.attr,
- &attr_max_retry_count.attr
+static struct device_attribute *balloon_attrs[] = {
+ &dev_attr_target_kb,
+ &dev_attr_target,
+ &dev_attr_schedule_delay.attr,
+ &dev_attr_max_schedule_delay.attr,
+ &dev_attr_retry_count.attr,
+ &dev_attr_max_retry_count.attr
};
static struct attribute *balloon_info_attrs[] = {
- &attr_current_kb.attr,
- &attr_low_kb.attr,
- &attr_high_kb.attr,
+ &dev_attr_current_kb.attr,
+ &dev_attr_low_kb.attr,
+ &dev_attr_high_kb.attr,
NULL
};
-static struct attribute_group balloon_info_group = {
+static const struct attribute_group balloon_info_group = {
.name = "info",
.attrs = balloon_info_attrs
};
-static struct sysdev_class balloon_sysdev_class = {
- .name = BALLOON_CLASS_NAME
+static struct bus_type balloon_subsys = {
+ .name = BALLOON_CLASS_NAME,
+ .dev_name = BALLOON_CLASS_NAME,
};
-static int register_balloon(struct sys_device *sysdev)
+static int register_balloon(struct device *dev)
{
int i, error;
- error = sysdev_class_register(&balloon_sysdev_class);
+ error = subsys_system_register(&balloon_subsys, NULL);
if (error)
return error;
- sysdev->id = 0;
- sysdev->cls = &balloon_sysdev_class;
+ dev->id = 0;
+ dev->bus = &balloon_subsys;
- error = sysdev_register(sysdev);
+ error = device_register(dev);
if (error) {
- sysdev_class_unregister(&balloon_sysdev_class);
+ bus_unregister(&balloon_subsys);
return error;
}
for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++) {
- error = sysdev_create_file(sysdev, balloon_attrs[i]);
+ error = device_create_file(dev, balloon_attrs[i]);
if (error)
goto fail;
}
- error = sysfs_create_group(&sysdev->kobj, &balloon_info_group);
+ error = sysfs_create_group(&dev->kobj, &balloon_info_group);
if (error)
goto fail;
@@ -247,9 +250,9 @@ static int register_balloon(struct sys_device *sysdev)
fail:
while (--i >= 0)
- sysdev_remove_file(sysdev, balloon_attrs[i]);
- sysdev_unregister(sysdev);
- sysdev_class_unregister(&balloon_sysdev_class);
+ device_remove_file(dev, balloon_attrs[i]);
+ device_unregister(dev);
+ bus_unregister(&balloon_subsys);
return error;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-13 10:55:44 +0000