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Rafael J. Wysocki 70f0cb2d7f ACPI: property: Fix buffer properties extraction for subnodes 
commit d0759b1098 upstream.

The ACPI handle passed to acpi_extract_properties() as the first
argument represents the ACPI namespace scope in which to look for
objects returning buffers associated with buffer properties.

For _DSD objects located immediately under ACPI devices, this handle is
the same as the handle of the device object holding the _DSD, but for
data-only subnodes it is not so.

First of all, data-only subnodes are represented by objects that
cannot hold other objects in their scopes (like control methods).
Therefore a data-only subnode handle cannot be used for completing
relative pathname segments, so the current code in
in acpi_nondev_subnode_extract() passing a data-only subnode handle
to acpi_extract_properties() is invalid.

Moreover, a data-only subnode of device A may be represented by an
object located in the scope of device B (which kind of makes sense,
for instance, if A is a B's child).  In that case, the scope in
question would be the one of device B.  In other words, the scope
mentioned above is the same as the scope used for subnode object
lookup in acpi_nondev_subnode_extract().

Accordingly, rearrange that function to use the same scope for the
extraction of properties and subnode object lookup.

Fixes: 103e10c69c ("ACPI: property: Add support for parsing buffer property UUID")
Cc: 6.0+ <stable@vger.kernel.org> # 6.0+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-10-19 16:37:16 +02:00
arch s390/vmlinux.lds.S: Move .vmlinux.info to end of allocatable sections 2025-10-19 16:37:16 +02:00
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README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.