When CONFIG_SATA_HOST=n there are no NCQ capable host drivers built so it is safe to hardwire ata_ncq_enabled() to always return zero. Code size savings on m68k arch using (modified) atari_defconfig: text data bss dec hex filename before: 37820 572 40 38432 9620 drivers/ata/libata-core.o 21040 105 4096 25241 6299 drivers/ata/libata-scsi.o 17405 18 0 17423 440f drivers/ata/libata-eh.o after: 37582 572 40 38194 9532 drivers/ata/libata-core.o 20702 105 4096 24903 6147 drivers/ata/libata-scsi.o 17353 18 0 17371 43db drivers/ata/libata-eh.o Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx> --- include/linux/libata.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/libata.h b/include/linux/libata.h index 0f208df6428e..e461664ee0b9 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1631,6 +1631,8 @@ extern struct ata_device *ata_dev_next(struct ata_device *dev, */ static inline int ata_ncq_enabled(struct ata_device *dev) { + if (!IS_ENABLED(CONFIG_SATA_HOST)) + return 0; return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; } -- 2.24.1