mbind01, get_mempolicy01: dont use hardcoded node 0

These tests are failing on following setup:

  # numactl -H
  available: 2 nodes (0-1)
  node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
  23 24 25 26 27 28 29 30 31
  node 0 size: 0 MB
  node 0 free: 0 MB
  node 1 cpus:
  node 1 size: 12288 MB
  node 1 free: 9998 MB
  node distances:
  node   0   1
    0:  10  40
    1:  40  10

Avoid hardcoded node 0 by using numa_get_mems_allowed().

---
 .../syscalls/get_mempolicy/get_mempolicy01.c       |    7 ++++---
 testcases/kernel/syscalls/mbind/mbind01.c          |    7 ++++---
 2 files changed, 8 insertions(+), 6 deletions(-)

index 0565d6f..12dc8d3 100644
@@ -226,20 +226,21 @@ static int do_test(struct test_case *tc)
 	nodemask_t *nodemask, *getnodemask;
 	unsigned long maxnode = NUMA_NUM_NODES;
 #else
-	struct bitmask *nodemask = numa_allocate_nodemask();
+	struct bitmask *nodemask = NULL;
 	struct bitmask *getnodemask = numa_allocate_nodemask();
 #endif
 	char *p = NULL;
 	unsigned long len = MEM_LENGTH;
 
 #if !defined(LIBNUMA_API_VERSION) || LIBNUMA_API_VERSION < 2
+	struct bitmask *allowed = numa_get_mems_allowed();
 	nodemask = malloc(sizeof(nodemask_t));
 	nodemask_zero(nodemask);
-	nodemask_set(nodemask, 0);
+	copy_bitmask_to_nodemask(allowed, nodemask);
 	getnodemask = malloc(sizeof(nodemask_t));
 	nodemask_zero(getnodemask);
 #else
-	numa_bitmask_setbit(nodemask, 0);
+	nodemask = numa_get_mems_allowed();
 #endif
 	switch (tc->ttype) {
 	case DEFAULT:

index 4b25db0..48066db 100644
@@ -211,7 +211,7 @@ static int do_test(struct test_case *tc)
 #if !defined(LIBNUMA_API_VERSION) || LIBNUMA_API_VERSION < 2
 	nodemask_t *nodemask, *getnodemask;
 #else
-	struct bitmask *nodemask = numa_allocate_nodemask();
+	struct bitmask *nodemask = NULL;
 	struct bitmask *getnodemask = numa_allocate_nodemask();
 #endif
 	unsigned long maxnode = NUMA_NUM_NODES;

@@ -219,13 +219,14 @@ static int do_test(struct test_case *tc)
 	unsigned long *invalid_nodemask;
 
 #if !defined(LIBNUMA_API_VERSION) || LIBNUMA_API_VERSION < 2
+	struct bitmask *allowed = numa_get_mems_allowed();
 	nodemask = malloc(sizeof(nodemask_t));
 	nodemask_zero(nodemask);
-	nodemask_set(nodemask, 0);
+	copy_bitmask_to_nodemask(allowed, nodemask);
 	getnodemask = malloc(sizeof(nodemask_t));
 	nodemask_zero(getnodemask);
 #else
-	numa_bitmask_setbit(nodemask, 0);
+	nodemask = numa_get_mems_allowed();
 #endif
 	p = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
 		    0, 0);

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----- Original Message -----

Please hold off from comitting this patch,
I just found it breaks on larger NUMA systems in get_mempolicy.

Regards,
Jan

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