iommufd/selftest: fix the unmap-all length on 32-bit architectures

_test_ioctl_ioas_unmap() takes the length as a size_t, so on 32-bit
architectures test_ioctl_ioas_unmap(0, UINT64_MAX), which asks to unmap
everything, passes SIZE_MAX instead and doesn't test the unmap-all case:

  iommufd.c:861:9: warning: conversion from 'long long unsigned int' to 'size_t' {aka 'unsigned int'} changes value from '18446744073709551615' to '4294967295' [-Woverflow]

Take the length as uint64_t, like the length field of struct
iommu_ioas_unmap. While at it, cast the pointers that go into 64-bit
UAPI fields through uintptr_t, as casting them straight to uint64_t
warns on 32-bit.

Signed-off-by: Sasha Levin <sashal@kernel.org>
Link: https://patch.msgid.link/20261103163910.640756-1-sashal@kernel.org
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

0 files changed, 0 insertions, 0 deletions