vb2_core_expbuf
EXPORT_SYMBOL_GPL(vb2_core_expbuf);
return vb2_core_expbuf(q, &eb->fd, eb->type, vb,
ret = vb2_core_expbuf(&ctx->vb_q, &exp->fd, q->type, vb2,
int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type,