MUTEX_FLAG_HANDOFF
if (flags & MUTEX_FLAG_HANDOFF)
owner = MUTEX_FLAG_HANDOFF;
if (owner & MUTEX_FLAG_HANDOFF)
flags |= MUTEX_FLAG_HANDOFF;
MUTEX_WARN_ON(flags & (MUTEX_FLAG_HANDOFF | MUTEX_FLAG_PICKUP));
if (owner & MUTEX_FLAG_HANDOFF)