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This patch restores the iommu_flush_iotlb_all() function. Commit69e5a17511("iommu: Remove useless flush from iommu_create_device_direct_mappings()") claims it removed the last call-site, except it did not. There is still at least one caller in drivers/gpu/drm/msm/msm_iommu.c so keep the function around until all call-sites are updated. Cc: Jason Gunthorpe <jgg@ziepe.ca> Fixes:69e5a17511("iommu: Remove useless flush from iommu_create_device_direct_mappings()") Acked-by: Will Deacon <will@kernel.org> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>