ata: move sata_scr_*() to libata-sata.c

* move sata_scr_*() to libata-sata.c

* add static inlines for CONFIG_SATA_HOST=n case

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

   text    data     bss     dec     hex filename
before:
  35642     572      40   36254    8d9e drivers/ata/libata-core.o
  16607      18       0   16625    40f1 drivers/ata/libata-eh.o
after:
  32846     572      40   33458    82b2 drivers/ata/libata-core.o
  16243      18       0   16261    3f85 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>

1 files changed, 0 insertions, 109 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b4a952dce7ab..ba1e5c4d3c09 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5216,115 +5216,6 @@ err:
 }
 
 /**
- *	sata_scr_valid - test whether SCRs are accessible
- *	@link: ATA link to test SCR accessibility for
- *
- *	Test whether SCRs are accessible for @link.
- *
- *	LOCKING:
- *	None.
- *
- *	RETURNS:
- *	1 if SCRs are accessible, 0 otherwise.
- */
-int sata_scr_valid(struct ata_link *link)
-{
-	struct ata_port *ap = link->ap;
-
-	return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
-}
-EXPORT_SYMBOL_GPL(sata_scr_valid);
-
-/**
- *	sata_scr_read - read SCR register of the specified port
- *	@link: ATA link to read SCR for
- *	@reg: SCR to read
- *	@val: Place to store read value
- *
- *	Read SCR register @reg of @link into *@val.  This function is
- *	guaranteed to succeed if @link is ap->link, the cable type of
- *	the port is SATA and the port implements ->scr_read.
- *
- *	LOCKING:
- *	None if @link is ap->link.  Kernel thread context otherwise.
- *
- *	RETURNS:
- *	0 on success, negative errno on failure.
- */
-int sata_scr_read(struct ata_link *link, int reg, u32 *val)
-{
-	if (ata_is_host_link(link)) {
-		if (sata_scr_valid(link))
-			return link->ap->ops->scr_read(link, reg, val);
-		return -EOPNOTSUPP;
-	}
-
-	return sata_pmp_scr_read(link, reg, val);
-}
-EXPORT_SYMBOL_GPL(sata_scr_read);
-
-/**
- *	sata_scr_write - write SCR register of the specified port
- *	@link: ATA link to write SCR for
- *	@reg: SCR to write
- *	@val: value to write
- *
- *	Write @val to SCR register @reg of @link.  This function is
- *	guaranteed to succeed if @link is ap->link, the cable type of
- *	the port is SATA and the port implements ->scr_read.
- *
- *	LOCKING:
- *	None if @link is ap->link.  Kernel thread context otherwise.
- *
- *	RETURNS:
- *	0 on success, negative errno on failure.
- */
-int sata_scr_write(struct ata_link *link, int reg, u32 val)
-{
-	if (ata_is_host_link(link)) {
-		if (sata_scr_valid(link))
-			return link->ap->ops->scr_write(link, reg, val);
-		return -EOPNOTSUPP;
-	}
-
-	return sata_pmp_scr_write(link, reg, val);
-}
-EXPORT_SYMBOL_GPL(sata_scr_write);
-
-/**
- *	sata_scr_write_flush - write SCR register of the specified port and flush
- *	@link: ATA link to write SCR for
- *	@reg: SCR to write
- *	@val: value to write
- *
- *	This function is identical to sata_scr_write() except that this
- *	function performs flush after writing to the register.
- *
- *	LOCKING:
- *	None if @link is ap->link.  Kernel thread context otherwise.
- *
- *	RETURNS:
- *	0 on success, negative errno on failure.
- */
-int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
-{
-	if (ata_is_host_link(link)) {
-		int rc;
-
-		if (sata_scr_valid(link)) {
-			rc = link->ap->ops->scr_write(link, reg, val);
-			if (rc == 0)
-				rc = link->ap->ops->scr_read(link, reg, &val);
-			return rc;
-		}
-		return -EOPNOTSUPP;
-	}
-
-	return sata_pmp_scr_write(link, reg, val);
-}
-EXPORT_SYMBOL_GPL(sata_scr_write_flush);
-
-/**
  *	ata_phys_link_online - test whether the given link is online
  *	@link: ATA link to test
  *