RDS_MSG_ON_SOCK
if (test_bit(RDS_MSG_ON_SOCK, &rm->m_flags) &&
if (test_bit(RDS_MSG_ON_SOCK, &rm->m_flags)
if (!test_bit(RDS_MSG_ON_SOCK, &rm->m_flags))
if (test_and_clear_bit(RDS_MSG_ON_SOCK, &rm->m_flags)) {
clear_bit(RDS_MSG_ON_SOCK, &rm->m_flags);
set_bit(RDS_MSG_ON_SOCK, &rm->m_flags);