+
+#define to_ext_attr(x) container_of(x, struct sysdev_ext_attribute, attr)
+
+ssize_t sysdev_store_ulong(struct sys_device *sysdev,
+ struct sysdev_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+ char *end;
+ unsigned long new = simple_strtoul(buf, &end, 0);
+ if (end == buf)
+ return -EINVAL;
+ *(unsigned long *)(ea->var) = new;
+ return end - buf;
+}
+EXPORT_SYMBOL_GPL(sysdev_store_ulong);
+
+ssize_t sysdev_show_ulong(struct sys_device *sysdev,
+ struct sysdev_attribute *attr,
+ char *buf)
+{
+ struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+ return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var));
+}
+EXPORT_SYMBOL_GPL(sysdev_show_ulong);
+
+ssize_t sysdev_store_int(struct sys_device *sysdev,
+ struct sysdev_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+ char *end;
+ long new = simple_strtol(buf, &end, 0);
+ if (end == buf || new > INT_MAX || new < INT_MIN)
+ return -EINVAL;
+ *(int *)(ea->var) = new;
+ return end - buf;
+}
+EXPORT_SYMBOL_GPL(sysdev_store_int);
+
+ssize_t sysdev_show_int(struct sys_device *sysdev,
+ struct sysdev_attribute *attr,
+ char *buf)
+{
+ struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+ return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var));
+}
+EXPORT_SYMBOL_GPL(sysdev_show_int);
+