L2TP_SESSION_MAGIC
session->magic = L2TP_SESSION_MAGIC;
if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
WARN_ON_ONCE(session->magic != L2TP_SESSION_MAGIC);