void tty_buffer_free_all(struct tty_port *port)
 {
        struct tty_bufhead *buf = &port->buf;
-       struct tty_buffer *thead;
+       struct tty_buffer *p;
 
-       while ((thead = buf->head) != NULL) {
-               buf->head = thead->next;
-               kfree(thead);
+       while ((p = buf->head) != NULL) {
+               buf->head = p->next;
+               kfree(p);
        }
-       while ((thead = buf->free) != NULL) {
-               buf->free = thead->next;
-               kfree(thead);
+       while ((p = buf->free) != NULL) {
+               buf->free = p->next;
+               kfree(p);
        }
        buf->tail = NULL;
        buf->memory_used = 0;
 static void __tty_buffer_flush(struct tty_port *port)
 {
        struct tty_bufhead *buf = &port->buf;
-       struct tty_buffer *thead;
+       struct tty_buffer *next;
 
        if (unlikely(buf->head == NULL))
                return;
-       while ((thead = buf->head->next) != NULL) {
+       while ((next = buf->head->next) != NULL) {
                tty_buffer_free(port, buf->head);
-               buf->head = thead;
+               buf->head = next;
        }
        WARN_ON(buf->head != buf->tail);
        buf->head->read = buf->head->commit;