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Detect hugetlbfs. hugetlbfs__mountpoint() will be used during recording to help identifying hugetlb mmaps: which should be recognized as anon mapping. Signed-off-by: Wang Nan <wangnan0@huawei.com> Reviewed-by: Nilay Vaish <nilayvaish@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Hou Pengyang <houpengyang@huawei.com> Cc: Zefan Li <lizefan@huawei.com> Link: http://lkml.kernel.org/r/1473137909-142064-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>