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[ Upstream commit94a568ce32] We started using a 64 bit completion value. Unfortunately, we only stored the low 32-bits, so a very large completion value would never be matched in iommu_completion_wait(). Fixes:c69d89aff3("iommu/amd: Use 4K page for completion wait write-back semaphore") Signed-off-by: John Sperbeck <jsperbeck@google.com> Link: https://lore.kernel.org/r/20220801192229.3358786-1-jsperbeck@google.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.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.