> -----Original Message----- > From: Moore, Robert > Sent: Monday, April 17, 2017 10:13 AM > To: Guenter Roeck <linux@xxxxxxxxxxxx>; Zheng, Lv <lv.zheng@xxxxxxxxx> > Cc: Wysocki, Rafael J <rafael.j.wysocki@xxxxxxxxx>; Len Brown > <lenb@xxxxxxxxxx>; linux-acpi@xxxxxxxxxxxxxxx; devel@xxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx > Subject: RE: [PATCH] ACPICA: Export mutex functions > > There is a model for the drivers to directly acquire an AML mutex > object. That is why the acquire/release public interfaces were added to > ACPICA. > > I forget all of the details, but the model was developed with MS and > others during the ACPI 6.0 timeframe. > > [Moore, Robert] Here is the case where the OS may need to directly acquire an AML mutex: >From the ACPI spec: 19.6.2 Acquire (Acquire a Mutex) Note: For Mutex objects referenced by a _DLM object, the host OS may also contend for ownership. Other than this case, the OS/drivers should never need to directly acquire an AML mutex. Bob -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
