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33be4e8928
Move common utility functions into uffd-common.[ch] files from the original userfaultfd.c. This prepares for a split of userfaultfd.c into two tests: one to only cover the old but powerful stress test, the other one covers all the functional tests. This movement is kind of a brute-force effort for now, with light touch-ups but nothing should really change. There's chances to optimize more, but let's leave that for later. Link: https://lkml.kernel.org/r/20230412164241.328259-1-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: 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>