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>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 8434f2323b87..d98c6b096f8e 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -1010,7 +1010,7 @@ static void __init pcibios_fixup_irqs(void)
  * Work around broken HP Pavilion Notebooks which assign USB to
  * IRQ 9 even though it is actually wired to IRQ 11
  */
-static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d)
+static int __init fix_broken_hp_bios_irq9(const struct dmi_system_id *d)
 {
         if (!broken_hp_bios_irq9) {
                 broken_hp_bios_irq9 = 1;
@@ -1023,7 +1023,7 @@ static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d)
  * Work around broken Acer TravelMate 360 Notebooks which assign
  * Cardbus to IRQ 11 even though it is actually wired to IRQ 10
  */
-static int __init fix_acer_tm360_irqrouting(struct dmi_system_id *d)
+static int __init fix_acer_tm360_irqrouting(const struct dmi_system_id *d)
 {
         if (!acer_tm360_irqrouting) {
                 acer_tm360_irqrouting = 1;