I had relied on the kbuild robot for cross build coverage, however it
only builds alpha_defconfig.  Switch from HPAGE_SIZE to PMD_SIZE, which
is more widely defined.

Fixes: 658922e57b84 ("libnvdimm, pfn: fix memmap reservation sizing")
Cc: <sta...@vger.kernel.org>
Reported-by: Guenter Roeck <guen...@roeck-us.net>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
 drivers/nvdimm/pmem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 5101f3ab4f29..e5a8bf032ec9 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -404,7 +404,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
                 * vmemmap_populate_hugepages() allocates the memmap array in
                 * HPAGE_SIZE chunks.
                 */
-               memmap_size = ALIGN(64 * npfns, HPAGE_SIZE);
+               memmap_size = ALIGN(64 * npfns, PMD_SIZE);
                offset = ALIGN(start + SZ_8K + memmap_size, nd_pfn->align)
                        - start;
        } else if (nd_pfn->mode == PFN_MODE_RAM)

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