diff options
| author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2020-03-26 18:58:10 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-03-26 19:28:19 +0300 |
| commit | 4c9029e7d00f31923bcecbaab6a12ba52017924e (patch) | |
| tree | 6010ae02826371b47b7bef0505bf7660e6523b51 /drivers/ata/libata-eh.c | |
| parent | cba97ea18d92f3b9c56816fe9325aeb38a46746f (diff) | |
| download | linux-4c9029e7d00f31923bcecbaab6a12ba52017924e.tar.xz | |
ata: let compiler optimize out ata_eh_set_lpm() on non-SATA hosts
Add !IS_ENABLED(CONFIG_SATA_HOST) to ata_eh_set_lpm() to allow
compiler to optimize out the function for non-SATA configs (for
PATA hosts "ap && !ap->ops->set_lpm" condition is always true so
it's sufficient for the function to return zero).
Code size savings on m68k arch using (modified) atari_defconfig:
text data bss dec hex filename
before:
17353 18 0 17371 43db drivers/ata/libata-eh.o
after:
16607 18 0 16625 40f1 drivers/ata/libata-eh.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>
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 04275f4c8d36..8dc33b6832f0 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -3443,7 +3443,8 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, int rc; /* if the link or host doesn't do LPM, noop */ - if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) + if (!IS_ENABLED(CONFIG_SATA_HOST) || + (link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm)) return 0; /* |