iommu: Add dummy implementations for !IOMMU_IOVA

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Currently, building code which uses the API guarded by the IOMMU_IOVA
will fail to link if IOMMU_IOVA is not enabled. Often this code will be
using the API provided by the IOMMU_API Kconfig symbol, but support for
this can be optional, with code falling back to contiguous memory. This
commit implements dummy functions for the IOVA API so that it can be
compiled out.

With both IOMMU_API and IOMMU_IOVA optional, code can now be built with
or without support for IOMMU without having to resort to #ifdefs in the
user code.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Thierry Reding 2017-03-20 20:11:28 +01:00 • committed by Joerg Roedel

parent 82df0a4368

commit 21aff52ab2

1 changed files with 91 additions and 0 deletions

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include/linux/iova.h

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