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[PATCH] mark several libata datastructures const 

Hi,

the patch below marks several libata (and libata-driver) structures
const so that they end up in the .rodata segment and don't false-share
cachelines with things that get dirtied often.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Arjan van de Ven 2005-11-28 10:06:23 +01:00 committed by Jeff Garzik
parent 6946d28a9f
commit 98ac62defe
8 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/ahci.c
View File

@ -243,7 +243,7 @@ static const struct ata_port_operations ahci_ops = {
.port_stop = ahci_port_stop,
};
static struct ata_port_info ahci_port_info[] = {
static const struct ata_port_info ahci_port_info[] = {
/* board_ahci */
{
.sht = &ahci_sht,

4
drivers/scsi/libata-core.c
View File

@ -605,7 +605,7 @@ void ata_rwcmd_protocol(struct ata_queued_cmd *qc)
tf->command = ata_rw_cmds[index + lba48 + write];
}
static const char * xfer_mode_str[] = {
static const char * const xfer_mode_str[] = {
"UDMA/16",
"UDMA/25",
"UDMA/33",
@ -2083,7 +2083,7 @@ static void ata_pr_blacklisted(const struct ata_port *ap,
ap->id, dev->devno);
}
static const char * ata_dma_blacklist [] = {
static const char * const ata_dma_blacklist [] = {
"WDC AC11000H",
"WDC AC22100H",
"WDC AC32500H",

6
drivers/scsi/libata-scsi.c
View File

@ -418,7 +418,7 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
int i;
/* Based on the 3ware driver translation table */
static unsigned char sense_table[][4] = {
static const unsigned char sense_table[][4] = {
/* BBD|ECC|ID|MAR */
{0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
/* BBD|ECC|ID */
@ -449,7 +449,7 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
{0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
{0xFF, 0xFF, 0xFF, 0xFF}, // END mark
};
static unsigned char stat_table[][4] = {
static const unsigned char stat_table[][4] = {
/* Must be first because BUSY means no other bits valid */
{0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
{0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
@ -1532,7 +1532,7 @@ unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
return 0;
}
static const char *inq_83_str = "Linux ATA-SCSI simulator";
static const char * const inq_83_str = "Linux ATA-SCSI simulator";
/**
* ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity

2
drivers/scsi/sata_mv.c
View File

@ -430,7 +430,7 @@ static const struct ata_port_operations mv6_ops = {
.host_stop = mv_host_stop,
};
static struct ata_port_info mv_port_info[] = {
static const struct ata_port_info mv_port_info[] = {
{ /* chip_504x */
.sht = &mv_sht,
.host_flags = MV_COMMON_FLAGS,

2
drivers/scsi/sata_promise.c
View File

@ -158,7 +158,7 @@ static const struct ata_port_operations pdc_pata_ops = {
.host_stop = ata_pci_host_stop,
};
static struct ata_port_info pdc_port_info[] = {
static const struct ata_port_info pdc_port_info[] = {
/* board_2037x */
{
.sht = &pdc_ata_sht,

2
drivers/scsi/sata_qstor.c
View File

@ -170,7 +170,7 @@ static const struct ata_port_operations qs_ata_ops = {
.bmdma_status = qs_bmdma_status,
};
static struct ata_port_info qs_port_info[] = {
static const struct ata_port_info qs_port_info[] = {
/* board_2068_idx */
{
.sht = &qs_ata_sht,

2
drivers/scsi/sata_sil.c
View File

@ -176,7 +176,7 @@ static const struct ata_port_operations sil_ops = {
.host_stop = ata_pci_host_stop,
};
static struct ata_port_info sil_port_info[] = {
static const struct ata_port_info sil_port_info[] = {
/* sil_3112 */
{
.sht = &sil_sht,

2
drivers/scsi/sata_sx4.c
View File

@ -215,7 +215,7 @@ static const struct ata_port_operations pdc_20621_ops = {
.host_stop = pdc20621_host_stop,
};
static struct ata_port_info pdc_port_info[] = {
static const struct ata_port_info pdc_port_info[] = {
/* board_20621 */
{
.sht = &pdc_sata_sht,