dax: cleanup needlessly global symbol warnings

drivers/dax/dax.c:75:6: warning: symbol 'dax_region_put' was not declared.
drivers/dax/dax.c:95:19: warning: symbol 'alloc_dax_region' was not declared.
drivers/dax/dax.c:173:5: warning: symbol 'devm_create_dax_dev' was not declared.
drivers/dax/pmem.c:27:17: warning: symbol 'to_dax_pmem' was not declared.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

2 files changed, 2 insertions, 1 deletions

diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
index 803f3953b341..736c03830fd0 100644
--- a/drivers/dax/dax.c
+++ b/drivers/dax/dax.c
@@ -18,6 +18,7 @@
 #include <linux/dax.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include "dax.h"
 
 static int dax_major;
 static struct class *dax_class;
diff --git a/drivers/dax/pmem.c b/drivers/dax/pmem.c
index dfb168568af1..59b75c5972bb 100644
--- a/drivers/dax/pmem.c
+++ b/drivers/dax/pmem.c
@@ -24,7 +24,7 @@ struct dax_pmem {
         struct completion cmp;
 };
 
-struct dax_pmem *to_dax_pmem(struct percpu_ref *ref)
+static struct dax_pmem *to_dax_pmem(struct percpu_ref *ref)
 {
         return container_of(ref, struct dax_pmem, ref);
 }