[PATCH v2 1/2] selftests/mm: export get_free_hugepages()

[Breno Leitao]

get_free_hugepages() is helpful for other hugepage tests. Export it to
the common file (vm_util.c) to be reused.

Signed-off-by: Breno Leitao <lei...@debian.org>
---
 tools/testing/selftests/mm/hugetlb-madvise.c | 19 -------------------
 tools/testing/selftests/mm/vm_util.c         | 19 +++++++++++++++++++
 tools/testing/selftests/mm/vm_util.h         |  1 +
 3 files changed, 20 insertions(+), 19 deletions(-)

diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c 
b/tools/testing/selftests/mm/hugetlb-madvise.c
index d55322df4b73..f32d99565c5e 100644
--- a/tools/testing/selftests/mm/hugetlb-madvise.c
+++ b/tools/testing/selftests/mm/hugetlb-madvise.c
@@ -36,25 +36,6 @@
 unsigned long huge_page_size;
 unsigned long base_page_size;
 
-unsigned long get_free_hugepages(void)
-{
-       unsigned long fhp = 0;
-       char *line = NULL;
-       size_t linelen = 0;
-       FILE *f = fopen("/proc/meminfo", "r");
-
-       if (!f)
-               return fhp;
-       while (getline(&line, &linelen, f) > 0) {
-               if (sscanf(line, "HugePages_Free:      %lu", &fhp) == 1)
-                       break;
-       }
-
-       free(line);
-       fclose(f);
-       return fhp;
-}
-
 void write_fault_pages(void *addr, unsigned long nr_pages)
 {
        unsigned long i;
diff --git a/tools/testing/selftests/mm/vm_util.c 
b/tools/testing/selftests/mm/vm_util.c
index 558c9cd8901c..3082b40492dd 100644
--- a/tools/testing/selftests/mm/vm_util.c
+++ b/tools/testing/selftests/mm/vm_util.c
@@ -269,3 +269,22 @@ int uffd_unregister(int uffd, void *addr, uint64_t len)
 
        return ret;
 }
+
+unsigned long get_free_hugepages(void)
+{
+       unsigned long fhp = 0;
+       char *line = NULL;
+       size_t linelen = 0;
+       FILE *f = fopen("/proc/meminfo", "r");
+
+       if (!f)
+               return fhp;
+       while (getline(&line, &linelen, f) > 0) {
+               if (sscanf(line, "HugePages_Free:      %lu", &fhp) == 1)
+                       break;
+       }
+
+       free(line);
+       fclose(f);
+       return fhp;
+}
diff --git a/tools/testing/selftests/mm/vm_util.h 
b/tools/testing/selftests/mm/vm_util.h
index c7fa61f0dff8..c02990bbd56f 100644
--- a/tools/testing/selftests/mm/vm_util.h
+++ b/tools/testing/selftests/mm/vm_util.h
@@ -51,6 +51,7 @@ int uffd_register(int uffd, void *addr, uint64_t len,
 int uffd_unregister(int uffd, void *addr, uint64_t len);
 int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len,
                              bool miss, bool wp, bool minor, uint64_t *ioctls);
+unsigned long get_free_hugepages(void);
 
 /*
  * On ppc64 this will only work with radix 2M hugepage size
-- 
2.34.1