ATA_PROT_FLAG_PIO 458 include/linux/ata.h return ATA_PROT_FLAG_PIO; ATA_PROT_FLAG_PIO 466 include/linux/ata.h return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO; ATA_PROT_FLAG_PIO 485 include/linux/ata.h return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;