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[PATCH] libata: kill unused xfer_mode functions 

Preceding xfer_mask changes make the following functions unused.

  ata_pio_modes(), base_from_shift(), ata_pr_blacklisted(), fgb()

Kill them.  Also, as xfer_mode_str[] is now only used by
ata_mode_string(), move it into the function.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-03-06 04:31:57 +09:00 committed by Jeff Garzik
parent a6d5a51cf1
commit 75f554bc13
1 changed files with 18 additions and 90 deletions
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108
drivers/scsi/libata-core.c
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@ -67,7 +67,6 @@ static void ata_set_mode(struct ata_port *ap);
static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev);
static unsigned int ata_dev_xfermask(struct ata_port *ap,
struct ata_device *dev);
static int fgb(u32 bitmap);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
@ -331,25 +330,6 @@ static int ata_xfer_mode2shift(unsigned int xfer_mode)
return -1;
}
static const char * const xfer_mode_str[] = {
"PIO0",
"PIO1",
"PIO2",
"PIO3",
"PIO4",
"MWDMA0",
"MWDMA1",
"MWDMA2",
"UDMA/16",
"UDMA/25",
"UDMA/33",
"UDMA/44",
"UDMA/66",
"UDMA/100",
"UDMA/133",
"UDMA7",
};
/**
* ata_mode_string - convert xfer_mask to string
* @xfer_mask: mask of bits supported; only highest bit counts.
@ -364,9 +344,26 @@ static const char * const xfer_mode_str[] = {
* Constant C string representing highest speed listed in
* @mode_mask, or the constant C string "<n/a>".
*/
static const char *ata_mode_string(unsigned int xfer_mask)
{
static const char * const xfer_mode_str[] = {
"PIO0",
"PIO1",
"PIO2",
"PIO3",
"PIO4",
"MWDMA0",
"MWDMA1",
"MWDMA2",
"UDMA/16",
"UDMA/25",
"UDMA/33",
"UDMA/44",
"UDMA/66",
"UDMA/100",
"UDMA/133",
"UDMA7",
};
int highbit;
highbit = fls(xfer_mask) - 1;
@ -827,35 +824,6 @@ static unsigned int ata_id_xfermask(const u16 *id)
return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
}
/*
* Compute the PIO modes available for this device. This is not as
* trivial as it seems if we must consider early devices correctly.
*
* FIXME: pre IDE drive timing (do we care ?).
*/
static unsigned int ata_pio_modes(const struct ata_device *adev)
{
u16 modes;
/* Usual case. Word 53 indicates word 64 is valid */
if (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) {
modes = adev->id[ATA_ID_PIO_MODES] & 0x03;
modes <<= 3;
modes |= 0x7;
return modes;
}
/* If word 64 isn't valid then Word 51 high byte holds the PIO timing
number for the maximum. Turn it into a mask and return it */
modes = (2 << ((adev->id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF)) - 1 ;
return modes;
/* But wait.. there's more. Design your standards by committee and
you too can get a free iordy field to process. However its the
speeds not the modes that are supported... Note drivers using the
timing API will get this right anyway */
}
/**
* ata_port_queue_task - Queue port_task
* @ap: The ata_port to queue port_task for
@ -1728,26 +1696,6 @@ int ata_timing_compute(struct ata_device *adev, unsigned short speed,
return 0;
}
static const struct {
unsigned int shift;
u8 base;
} xfer_mode_classes[] = {
{ ATA_SHIFT_UDMA, XFER_UDMA_0 },
{ ATA_SHIFT_MWDMA, XFER_MW_DMA_0 },
{ ATA_SHIFT_PIO, XFER_PIO_0 },
};
static u8 base_from_shift(unsigned int shift)
{
int i;
for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++)
if (xfer_mode_classes[i].shift == shift)
return xfer_mode_classes[i].base;
return 0xff;
}
static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
{
if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED))
@ -2596,13 +2544,6 @@ int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
return rc;
}
static void ata_pr_blacklisted(const struct ata_port *ap,
const struct ata_device *dev)
{
printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n",
ap->id, dev->devno);
}
static const char * const ata_dma_blacklist [] = {
"WDC AC11000H",
"WDC AC22100H",
@ -2690,19 +2631,6 @@ static unsigned int ata_dev_xfermask(struct ata_port *ap,
return xfer_mask;
}
/* find greatest bit */
static int fgb(u32 bitmap)
{
unsigned int i;
int x = -1;
for (i = 0; i < 32; i++)
if (bitmap & (1 << i))
x = i;
return x;
}
/**
* ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
* @ap: Port associated with device @dev