_DRM_LOCK_CONT
#define _DRM_LOCK_IS_CONT(lock) ((lock) & _DRM_LOCK_CONT)
#define _DRM_LOCKING_CONTEXT(lock) ((lock) & ~(_DRM_LOCK_HELD|_DRM_LOCK_CONT))
new = old | _DRM_LOCK_CONT;
_DRM_LOCK_CONT : 0);
new = old | _DRM_LOCK_CONT;