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20d3fac436
Many cow tests rely on FORCE_READ() to populate pages. Introduce a helper to make sure that the pages are actually populated, and fail otherwise. Link: https://lkml.kernel.org/r/20260122170224.4056513-6-kevin.brodsky@arm.com Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com> Suggested-by: David Hildenbrand (Red Hat) <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Mark Brown <broonie@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: SeongJae Park <sj@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Usama Anjum <Usama.Anjum@arm.com> Cc: wang lian <lianux.mm@gmail.com> Cc: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>