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    Subject[PATCH v2 13/26] ata: let compiler optimize out ata_dev_config_ncq() on non-SATA hosts
    Date
    Add !IS_ENABLED(CONFIG_SATA_HOST) to ata_dev_config_ncq() to allow
    compiler to optimize out the function for non-SATA configs.

    Code size savings on m68k arch using (modified) atari_defconfig:

    text data bss dec hex filename
    before:
    37582 572 40 38194 9532 drivers/ata/libata-core.o
    after:
    36462 572 40 37074 90d2 drivers/ata/libata-core.o

    Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
    ---
    drivers/ata/libata-core.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
    index 408dee580f24..73727a7f295b 100644
    --- a/drivers/ata/libata-core.c
    +++ b/drivers/ata/libata-core.c
    @@ -2287,6 +2287,8 @@ static int ata_dev_config_ncq(struct ata_device *dev,
    desc[0] = '\0';
    return 0;
    }
    + if (!IS_ENABLED(CONFIG_SATA_HOST))
    + return 0;
    if (dev->horkage & ATA_HORKAGE_NONCQ) {
    snprintf(desc, desc_sz, "NCQ (not used)");
    return 0;
    --
    2.24.1
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