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commit 91a229bb7ba86b2592c3f18c54b7b2c5e6fe0f95 upstream.
A warning is raised when __request_region() detects a conflict with a
resource whose resource.desc is IORES_DESC_DEVICE_PRIVATE_MEMORY.
But this warning is only valid for iomem_resources.
The hmem device resource uses resource.desc as the numa node id, which can
cause spurious warnings.
This warning appeared on a machine with multiple cxl memory expanders.
One of the NUMA node id is 6, which is the same as the value of
IORES_DESC_DEVICE_PRIVATE_MEMORY.
In this environment it was just a spurious warning, but when I saw the
warning I suspected a real problem so it's better to fix it.
This change fixes this by restricting the warning to only iomem_resource.
This also adds a missing new line to the warning message.
Link: https://lkml.kernel.org/r/20250719112604.25500-1-akinobu.mita@gmail.com
Fixes: 7dab174e2e ("dax/hmem: Move hmem device registration to dax_hmem.ko")
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 Restructured Text 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.