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libhugetlbfs, the user side utitlity to work with hugepages, does not have
any active support.  There are only 2 selftests which are part of in
vm/hmm_test.c that depends on libhugetlbfs.

This patch modifies the tests so that they will not require libhugetlb
library.

[axelrasmussen@google.com: : remove orphaned references to local_config.{h,mk}]
  Link: https://lkml.kernel.org/r/20220831211526.2743216-1-axelrasmussen@google.com
Link: https://lkml.kernel.org/r/20220801070231.13831-1-tsahu@linux.ibm.com

Signed-off-by: Tarun Sahu <tsahu@linux.ibm.com>
Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Tested-by: Zach O'Keefe <zokeefe@google.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vaibhav Jain <vaibhav@linux.ibm.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>