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drivers/firmware: const-ify DMI API and internals

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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>
This commit is contained in:
Jeff Garzik
2007-10-03 15:15:40 -04:00
parent bbf25010f1
commit 1855256c49
35 changed files with 103 additions and 97 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/osl.c
View File

@@ -1214,7 +1214,7 @@ acpi_os_validate_address (
}
#ifdef CONFIG_DMI
static int dmi_osi_linux(struct dmi_system_id *d)
static int dmi_osi_linux(const struct dmi_system_id *d)
{
printk(KERN_NOTICE "%s detected: enabling _OSI(Linux)\n", d->ident);
enable_osi_linux(1);

2
drivers/acpi/processor_idle.c
View File

@@ -92,7 +92,7 @@ module_param(bm_history, uint, 0644);
*
* To skip this limit, boot/load with a large max_cstate limit.
*/
static int set_max_cstate(struct dmi_system_id *id)
static int set_max_cstate(const struct dmi_system_id *id)
{
if (max_cstate > ACPI_PROCESSOR_MAX_POWER)
return 0;

2
drivers/acpi/sleep/main.c
View File

@@ -215,7 +215,7 @@ static struct pm_ops acpi_pm_ops = {
* Toshiba fails to preserve interrupts over S1, reinitialization
* of 8259 is needed after S1 resume.
*/
static int __init init_ints_after_s1(struct dmi_system_id *d)
static int __init init_ints_after_s1(const struct dmi_system_id *d)
{
printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
init_8259A_after_S1 = 1;

8
drivers/acpi/thermal.c
View File

@@ -1360,7 +1360,7 @@ static int acpi_thermal_resume(struct acpi_device *device)
}
#ifdef CONFIG_DMI
static int thermal_act(struct dmi_system_id *d) {
static int thermal_act(const struct dmi_system_id *d) {
if (act == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
@@ -1369,14 +1369,14 @@ static int thermal_act(struct dmi_system_id *d) {
}
return 0;
}
static int thermal_nocrt(struct dmi_system_id *d) {
static int thermal_nocrt(const struct dmi_system_id *d) {
printk(KERN_NOTICE "ACPI: %s detected: "
"disabling all critical thermal trip point actions.\n", d->ident);
nocrt = 1;
return 0;
}
static int thermal_tzp(struct dmi_system_id *d) {
static int thermal_tzp(const struct dmi_system_id *d) {
if (tzp == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
@@ -1385,7 +1385,7 @@ static int thermal_tzp(struct dmi_system_id *d) {
}
return 0;
}
static int thermal_psv(struct dmi_system_id *d) {
static int thermal_psv(const struct dmi_system_id *d) {
if (psv == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "