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update 

Signed-off-by: Wenchao Hao <haowenchao@huawei.com>
This commit is contained in:
Wenchao Hao 2023-04-20 20:48:44 +08:00
parent 1e969fa88f
commit 66986deed1
1 changed files with 26 additions and 0 deletions
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26
kobject-example.c
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@ -13,6 +13,13 @@ static void global_ref_release(struct percpu_ref *)
printk("%s %d\n", __func__, __LINE__); printk("%s %d\n", __func__, __LINE__);
} }
static ssize_t atomic_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "%ld\n", atomic_long_read(&global_ref.data->count));
}
static struct kobj_attribute atomic_attribute = __ATTR_RO(atomic);
static ssize_t is_percpu_show(struct kobject *kobj, struct kobj_attribute *attr, static ssize_t is_percpu_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf) char *buf)
{ {
@ -74,7 +81,24 @@ static ssize_t switch_to_percpu_store(struct kobject *kobj, struct kobj_attribut
} }
static struct kobj_attribute switch_to_percpu_attribute = __ATTR_WO(switch_to_percpu); static struct kobj_attribute switch_to_percpu_attribute = __ATTR_WO(switch_to_percpu);
static ssize_t get_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
percpu_ref_get(&global_ref);
return count;
}
static struct kobj_attribute get_attribute = __ATTR_WO(get);
static ssize_t put_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
percpu_ref_put(&global_ref);
return count;
}
static struct kobj_attribute put_attribute = __ATTR_WO(put);
static struct attribute *attrs[] = { static struct attribute *attrs[] = {
&atomic_attribute.attr,
&is_dying_attribute.attr, &is_dying_attribute.attr,
&is_zero_attribute.attr, &is_zero_attribute.attr,
&is_percpu_attribute.attr, &is_percpu_attribute.attr,
@ -83,6 +107,8 @@ static struct attribute *attrs[] = {
&kill_attribute.attr, &kill_attribute.attr,
&resurrect_attribute.attr, &resurrect_attribute.attr,
&switch_to_percpu_attribute.attr, &switch_to_percpu_attribute.attr,
&get_attribute.attr,
&put_attribute.attr,
NULL, NULL,
}; };
static struct attribute_group attr_group = { static struct attribute_group attr_group = {