drivers/firmware: const-ify DMI API and internals

Three main sets of changes:

1) dmi_get_system_info() return value should have been marked const,
   since callers should not be changing that data.

2) const-ify DMI internals, since DMI firmware tables should,
   whenever possible, be marked const to ensure we never ever write to
   that data area.

3) const-ify DMI API, to enable marking tables const where possible
   in low-level drivers.

And if we're really lucky, this might enable some additional
optimizations on the part of the compiler.

The bulk of the changes are #2 and #3, which are interrelated.  #1 could
have been a separate patch, but it was so small compared to the others,
it was easier to roll it into this changeset.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

4 files changed, 5 insertions, 5 deletions

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 6996eb5b7506..92c2d5082bef 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -919,7 +919,7 @@ static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 #ifdef CONFIG_PM
 static int piix_broken_suspend(void)
 {
-        static struct dmi_system_id sysids[] = {
+        static const struct dmi_system_id sysids[] = {
                 {
                         .ident = "TECRA M3",
                         .matches = {
@@ -1183,7 +1183,7 @@ static void __devinit piix_init_sata_map(struct pci_dev *pdev,
 
 static void piix_iocfg_bit18_quirk(struct pci_dev *pdev)
 {
-        static struct dmi_system_id sysids[] = {
+        static const struct dmi_system_id sysids[] = {
                 {
                         /* Clevo M570U sets IOCFG bit 18 if the cdrom
                          * isn't used to boot the system which
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 71bdc3b3189c..32a10c99c06f 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -40,7 +40,7 @@
  *      Cable special cases
  */
 
-static struct dmi_system_id cable_dmi_table[] = {
+static const struct dmi_system_id cable_dmi_table[] = {
         {
                 .ident = "HP Pavilion N5430",
                 .matches = {
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index c6066aa43ec8..eaaea848b649 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -214,7 +214,7 @@ static struct ata_port_operations cs5530_port_ops = {
         .port_start     = ata_port_start,
 };
 
-static struct dmi_system_id palmax_dmi_table[] = {
+static const struct dmi_system_id palmax_dmi_table[] = {
         {
                 .ident = "Palmax PD1100",
                 .matches = {
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 636c4f1a0b24..f143db4559e0 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -129,7 +129,7 @@ static const struct via_isa_bridge {
  *      Cable special cases
  */
 
-static struct dmi_system_id cable_dmi_table[] = {
+static const struct dmi_system_id cable_dmi_table[] = {
         {
                 .ident = "Acer Ferrari 3400",
                 .matches = {