acpi mpsafe panic? on acpi_panasonic

[Nate Lawson]

OGAWA Takaya wrote:
> At Mon, 23 Aug 2004 21:51:12 -0700,
> Nate Lawson wrote:
> 
>>>If all of WITNESS, INVARIANTS and INVARIANT_SUPPORT are turned on:
>>>Kernel panics.
>>>
>>>
>>>>witness_get: witness exhausted
>>>>panic: _sx_xlock (ACPI Panasonic extras): xlock already held @ /usr/src/sys/modules/acpi/acpi_panasonic/../../../i386/acpica/acpi_panasonic.c:214
>>
>>Please try the attached patch.
> 
> Thank you for taking a look at it, however there was no lock.
> Still the same symptom even with the patch.
> 
> Is there any additional information I can provide?

I took a closer look and found an error that caused the mutex to not be
released in some cases.  Please cvsup and test.  If someone has a
problem with acpi_asus, please let me know.  It does not appear to have
the same problem.

-Nate