vb2_core_streamoff
EXPORT_SYMBOL_GPL(vb2_core_streamoff);
vb2_core_streamoff(q, q->type);
return vb2_core_streamoff(q, type);
ret = vb2_core_streamoff(q, q->type);
int vb2_core_streamoff(struct vb2_queue *q, unsigned int type);