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dbba197edf
Some places in the kernel check the iommu_group pointer in 'struct device' in order to find out whether a device is mapped by an IOMMU. This is not good way to make this check, as the pointer will be moved to 'struct dev_iommu_data'. This way to make the check is also not very readable. Introduce an explicit function to perform this check. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Robin Murphy <robin.murphy@arm.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.