selftests/mm: drop global hpage_size in uffd tests
hpage_size was wrongly used. Sometimes it means hugetlb default size, sometimes it was used as thp size. Remove the global variable and use the right one at each place. Link: https://lkml.kernel.org/r/20230412164333.328596-1-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Dmitry Safonov <0x7f454c46@gmail.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Zach O'Keefe <zokeefe@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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