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| Filename | Latest commit message | Latest commit date |
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7adb562c3e
Whilst the symmetry of deferring to the existing sync callback in __iommu_map_page() is nice, taking a round-trip through iommu_iova_to_phys() is a pretty heavyweight way to get an address we can trivially compute from the page we already have. Tweaking it to just perform the cache maintenance directly when appropriate doesn't really make the code any more complicated, and the runtime efficiency gain can only be a benefit. Furthermore, the sync operations themselves know they can only be invoked on a managed DMA ops domain, so can use the fast specific domain lookup to avoid excessive manipulation of the group refcount (particularly in the scatterlist cases). Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.