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ata: let compiler optimize out ata_dev_config_ncq() on non-SATA hosts 

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

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2020-03-26 16:58:09 +01:00 committed by Jens Axboe
parent 7caa30ea82
commit cba97ea18d
1 changed files with 2 additions and 0 deletions
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2
drivers/ata/libata-core.c
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@ -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;