NF_CT_HELPER_F_CONFIGURED
helper->flags |= NF_CT_HELPER_F_CONFIGURED;
helper->flags &= ~NF_CT_HELPER_F_CONFIGURED;
WRITE_ONCE(helper->flags, helper->flags | NF_CT_HELPER_F_CONFIGURED);
WRITE_ONCE(helper->flags, helper->flags & ~NF_CT_HELPER_F_CONFIGURED);
if (READ_ONCE(helper->flags) & NF_CT_HELPER_F_CONFIGURED)
(NF_CT_HELPER_F_USERSPACE | NF_CT_HELPER_F_CONFIGURED)) ==