libnvdimm, pfn: fix ARCH=alpha allmodconfig build failure

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: <stable@vger.kernel.org>
Reported-by: Guenter Roeck <guenter@roeck-us.net>
Tested-by: Guenter Roeck <guenter@roeck-us.net>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 5101f3a..92f5365 100644 (file)
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -402,9 +402,9 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
 
                /*
                 * vmemmap_populate_hugepages() allocates the memmap array in
-                * HPAGE_SIZE chunks.
+                * PMD_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)