Fix the format specifier so that the attribute can be parsed correctly.
Currently it returns decimal 1000 for a 4096-byte alignment.

Cc: <sta...@vger.kernel.org>
Reported-by: Dave Jiang <dave.ji...@intel.com>
Fixes: 315c562536c4 ("libnvdimm, pfn: add 'align' attribute, default to 
HPAGE_SIZE")
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
 drivers/nvdimm/pfn_devs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index cea8350fbc7e..a2ac9e641aa9 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -108,7 +108,7 @@ static ssize_t align_show(struct device *dev,
 {
        struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
 
-       return sprintf(buf, "%lx\n", nd_pfn->align);
+       return sprintf(buf, "%ld\n", nd_pfn->align);
 }
 
 static ssize_t __align_store(struct nd_pfn *nd_pfn, const char *buf)

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