Commit 480b6837aa57 "nvdimm: fix PHYS_PFN/PFN_PHYS mixup" identified
that we were passing an invalid address to devm_nvdimm_ioremap(). With
that fixed it exposed a bug in the memory reservation size for flush
hint tables.  Since we map a full page we need to mock a full page of
memory to back the flush hint table entries.

Cc: Oliver O'Halloran <>
Signed-off-by: Dan Williams <>
 tools/testing/nvdimm/test/nfit.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index dd48f421844c..f64c57bf1d4b 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -603,7 +603,8 @@ static int nfit_test0_alloc(struct nfit_test *t)
                        return -ENOMEM;
                sprintf(t->label[i], "label%d", i);
-               t->flush[i] = test_alloc(t, sizeof(u64) * NUM_HINTS,
+               t->flush[i] = test_alloc(t, max(PAGE_SIZE,
+                                       sizeof(u64) * NUM_HINTS),
                if (!t->flush[i])
                        return -ENOMEM;

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