dma_resv_get_fences
EXPORT_SYMBOL_GPL(dma_resv_get_fences);
r = dma_resv_get_fences(obj, usage, &count, &fences);
r = dma_resv_get_fences(&resv, usage, &i, &fences);
r = dma_resv_get_fences(new_abo->tbo.base.resv, DMA_RESV_USAGE_WRITE,
int dma_resv_get_fences(struct dma_resv *obj, enum dma_resv_usage usage,