BLK_FEAT_PCI_P2PDMA
if (!(b->features & BLK_FEAT_PCI_P2PDMA))
t->features &= ~BLK_FEAT_PCI_P2PDMA;
lim.features |= BLK_FEAT_PCI_P2PDMA;
lim.features |= BLK_FEAT_PCI_P2PDMA;
lim.features |= BLK_FEAT_PCI_P2PDMA;
lim.features |= BLK_FEAT_PCI_P2PDMA;
BLK_FEAT_POLL | BLK_FEAT_ATOMIC_WRITES | BLK_FEAT_PCI_P2PDMA;
#define blk_queue_pci_p2pdma(q) ((q)->limits.features & BLK_FEAT_PCI_P2PDMA)