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ACPI: delete CONFIG_ACPI_BLACKLIST_YEAR 

About 10 years ago, this option was created to help
distros enable ACPI and not get distracted by ACPI
BIOS issues in machines which were deemed old
at that time, eg 1999 and earlier.

After a couple of years, the high volume distros
stopped bothering to set this option, and instead
simply ran in ACPI mode on all systems with an
ACPI BIOS -- regardless of BIOS DMI year.

Recently there have been some ACPI-enabled systems
with no DMI, mandating that CONFIG_ACPI_BLACKLIST_YEAR=0.

So it seems vanishingly unlikely that this option
is helping anybody run a 2013 kernel on a 1998 system,
and now more systems mandate this option be disabled,
so we simplify by deleting it entirely.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Len Brown 2013-11-09 00:13:16 -05:00 committed by Rafael J. Wysocki
parent 5e01dc7b26
commit 4c47cb197e
2 changed files with 0 additions and 46 deletions
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11
drivers/acpi/Kconfig
View File

@ -251,17 +251,6 @@ config ACPI_INITRD_TABLE_OVERRIDE
initrd, therefore it's safe to say Y.
See Documentation/acpi/initrd_table_override.txt for details
config ACPI_BLACKLIST_YEAR
int "Disable ACPI for systems before Jan 1st this year" if X86_32
default 0
help
Enter a 4-digit year, e.g., 2001, to disable ACPI by default
on platforms with DMI BIOS date before January 1st that year.
"acpi=force" can be used to override this mechanism.
Enter 0 to disable this mechanism and allow ACPI to
run by default no matter what the year. (default)
config ACPI_DEBUG
bool "Debug Statements"
default n

35
drivers/acpi/blacklist.c
View File

@ -75,39 +75,6 @@ static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
{""}
};
#if CONFIG_ACPI_BLACKLIST_YEAR
static int __init blacklist_by_year(void)
{
int year;
/* Doesn't exist? Likely an old system */
if (!dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL)) {
printk(KERN_ERR PREFIX "no DMI BIOS year, "
"acpi=force is required to enable ACPI\n" );
return 1;
}
/* 0? Likely a buggy new BIOS */
if (year == 0) {
printk(KERN_ERR PREFIX "DMI BIOS year==0, "
"assuming ACPI-capable machine\n" );
return 0;
}
if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
"acpi=force is required to enable ACPI\n",
year, CONFIG_ACPI_BLACKLIST_YEAR);
return 1;
}
return 0;
}
#else
static inline int blacklist_by_year(void)
{
return 0;
}
#endif
int __init acpi_blacklisted(void)
{
int i = 0;
@ -166,8 +133,6 @@ int __init acpi_blacklisted(void)
}
}
blacklisted += blacklist_by_year();
dmi_check_system(acpi_osi_dmi_table);
return blacklisted;