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ACPICA: Add text: ACPICA policy for new _OSI strings. No functional change. 

Adds further information about why new _OSI strings should be
adopted by all hosts as soon as possible.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
wifi-calibration
Bob Moore 2014-02-26 10:33:18 +08:00 committed by Rafael J. Wysocki
parent 3ef27bd002
commit 73581c022d
1 changed files with 25 additions and 0 deletions
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25
drivers/acpi/acpica/utosi.c
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@ -47,6 +47,31 @@
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utosi")
/******************************************************************************
*
* ACPICA policy for new _OSI strings:
*
* It is the stated policy of ACPICA that new _OSI strings will be integrated
* into this module as soon as possible after they are defined. It is strongly
* recommended that all ACPICA hosts mirror this policy and integrate any
* changes to this module as soon as possible. There are several historical
* reasons behind this policy:
*
* 1) New BIOSs tend to test only the case where the host responds TRUE to
* the latest version of Windows, which would respond to the latest/newest
* _OSI string. Not responding TRUE to the latest version of Windows will
* risk executing untested code paths throughout the DSDT and SSDTs.
*
* 2) If a new _OSI string is recognized only after a significant delay, this
* has the potential to cause problems on existing working machines because
* of the possibility that a new and different path through the ASL code
* will be executed.
*
* 3) New _OSI strings are tending to come out about once per year. A delay
* in recognizing a new string for a significant amount of time risks the
* release of another string which only compounds the initial problem.
*
*****************************************************************************/
/*
* Strings supported by the _OSI predefined control method (which is
* implemented internally within this module.)