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21c13829bc
This counts the number of devices attached to a vfio_group, ie the number of items in the group->device_list. It is only read in vfio_pin_pages(), as some kind of protection against limitations in type1. However, with all the code cleanups in this area, now that vfio_pin_pages() accepts a vfio_device directly it is redundant. All drivers are already calling vfio_register_emulated_iommu_dev() which directly creates a group specifically for the device and thus it is guaranteed that there is a singleton group. Leave a note in the comment about this requirement and remove the logic. Reviewed-by: Yi Liu <yi.l.liu@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/0-v2-d4374a7bf0c9+c4-vfio_dev_counter_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> |
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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 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.