822 	struct simple_attr *attr;  in simple_attr_open()  local
824 	attr = kmalloc(sizeof(*attr), GFP_KERNEL);  in simple_attr_open()
825 	if (!attr)  in simple_attr_open()
828 	attr->get = get;  in simple_attr_open()
829 	attr->set = set;  in simple_attr_open()
830 	attr->data = inode->i_private;  in simple_attr_open()
831 	attr->fmt = fmt;  in simple_attr_open()
832 	mutex_init(&attr->mutex);  in simple_attr_open()
834 	file->private_data = attr;  in simple_attr_open()
851 	struct simple_attr *attr;  in simple_attr_read()  local
855 	attr = file->private_data;  in simple_attr_read()
857 	if (!attr->get)  in simple_attr_read()
860 	ret = mutex_lock_interruptible(&attr->mutex);  in simple_attr_read()
865 		size = strlen(attr->get_buf);  in simple_attr_read()
868 		ret = attr->get(attr->data, &val);  in simple_attr_read()
872 		size = scnprintf(attr->get_buf, sizeof(attr->get_buf),  in simple_attr_read()
873 				 attr->fmt, (unsigned long long)val);  in simple_attr_read()
876 	ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);  in simple_attr_read()
878 	mutex_unlock(&attr->mutex);  in simple_attr_read()
887 	struct simple_attr *attr;  in simple_attr_write()  local
892 	attr = file->private_data;  in simple_attr_write()
893 	if (!attr->set)  in simple_attr_write()
896 	ret = mutex_lock_interruptible(&attr->mutex);  in simple_attr_write()
901 	size = min(sizeof(attr->set_buf) - 1, len);  in simple_attr_write()
902 	if (copy_from_user(attr->set_buf, buf, size))  in simple_attr_write()
905 	attr->set_buf[size] = '\0';  in simple_attr_write()
906 	val = simple_strtoll(attr->set_buf, NULL, 0);  in simple_attr_write()
907 	ret = attr->set(attr->data, val);  in simple_attr_write()
911 	mutex_unlock(&attr->mutex);  in simple_attr_write()
1235 static int empty_dir_setattr(struct dentry *dentry, struct iattr *attr)  in empty_dir_setattr()  argument