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Attempt VMA lock-based page fault handling first, and fall back to the existing mmap_lock-based handling if that fails. Link: https://lkml.kernel.org/r/20230227173632.3292573-30-surenb@google.com Signed-off-by: Suren Baghdasaryan <surenb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>