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08955af060
When invalidating existing table entries for unmap there is no need to know the physical address beforehand so don't do an extra walk of the IOMMU table to get it. Also when invalidating entries not finding an entry indicates an invalid unmap and not a lack of memory we also don't need to undo updates in this case. Implement this by splitting s390_iommu_update_trans() in a variant for validating and one for invalidating translations. Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Link: https://lore.kernel.org/r/20221109142903.4080275-5-schnelle@linux.ibm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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.