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2f8d25fa8a
u64 alignment behaves differently depending on the architecture and so <uapi/linux/types.h> offers __aligned_u64 to achieve consistent behavior in kernel<->userspace ABIs. There are structs in <uapi/linux/vfio.h> that can trivially be updated to __aligned_u64 because the struct sizes are multiples of 8 bytes. There is no change in memory layout on any CPU architecture and therefore this change is safe. The commits that follow this one handle the trickier cases where explanation about ABI breakage is necessary. Suggested-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Link: https://lore.kernel.org/r/20230918205617.1478722-2-stefanha@redhat.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> |
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