selftests/mm: hugetlb_madv_vs_map: add setup of HugeTLB pages

hugetlb_madv_vs_map test skips testing if there are no free huge pages
prepared by a wrapper script.

Add setup of HugeTLB pages to the test and make sure that the original
settings are restored on the test exit.

Link: https://lore.kernel.org/20260511162840.375890-40-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Li Wang <li.wang@linux.dev>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/mm/hugetlb_madv_vs_map.c b/tools/testing/selftests/mm/hugetlb_madv_vs_map.c
index dfbd71a7f709d13ff9dd7d65525a06b87c1fcab8..f94549efcc6ff3d7862ee717e678c695586d6df3 100644 (file)
--- a/tools/testing/selftests/mm/hugetlb_madv_vs_map.c
+++ b/tools/testing/selftests/mm/hugetlb_madv_vs_map.c
@@ -77,7 +77,6 @@ void *map_extra(void *unused)
 int main(void)
 {
        pthread_t thread1, thread2, thread3;
-       unsigned long free_hugepages;
        void *ret;
 
        /*
@@ -89,11 +88,9 @@ int main(void)
        ksft_print_header();
        ksft_set_plan(1);
 
-       free_hugepages = hugetlb_free_default_pages();
-
-       if (free_hugepages != 1)
+       if (!hugetlb_setup_default_exact(1))
                ksft_exit_skip("This test needs one and only one page to execute. Got %lu\n",
-                              free_hugepages);
+                              hugetlb_free_default_pages());
 
        mmap_size = default_huge_page_size();