CVS commit: src/sys/external/intel-public/acpica/dist/include/platform

[Jukka Ruohonen <jruoho%netbsd.org@localhost>]

Module Name:    src
Committed By:   jruoho
Date:           Sun Feb 28 12:57:11 UTC 2010

Modified Files:
        src/sys/external/intel-public/acpica/dist/include/platform: acnetbsd.h

Log Message:
In preparation for partial modularization of the acpi(4) subtree.

* * *

XXX:    The internal memory tracking of ACPICA, available when
        ACPI_DBG_TRACK_ALLOCATIONS is defined, has been removed
        from ACPI_DEBUG.

        This is due to the instability of the ABI of ACPICA.

        If the memory tracking is enabled, ACPICA will insert a header
        to each memory allocation. As a consequence, when ACPI specific
        code is loaded as a kernel module and the running kernel has
        been compiled with ACPI_DEBUG, the result is an instant panic.
        This happens because of unaligned memory access when the code
        tries to use ACPI_FREE for a buffer obtained via ACPI_ALLOCATE,
        AcpiEvaluateObject(), and related calls.

        If the involved memory statistics are required, a separate constant
        ACPI_DEBUG_ALLOC is available in options(4) for ACPI_DEBUG kernels.

* * *

Discussed with, and ok'ed by, jmcneill@ and pooka@.


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 \
    src/sys/external/intel-public/acpica/dist/include/platform/acnetbsd.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.