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Commit 73581c02 authored by Bob Moore's avatar Bob Moore Committed by Rafael J. Wysocki
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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: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 3ef27bd0

drivers/acpi/acpica/utosi.c

+25 −0
Original line number Diff line number Diff line
@@ -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.)