diff --git a/[refs] b/[refs]
index c3bcdbf71da3..65a18897452e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4f82f45730c68fdaf9b0472495a965188404866e
+refs/heads/master: 523a6a945f3cf5f1d337e50634687a577a732a5f
diff --git a/trunk/kernel/pid_namespace.c b/trunk/kernel/pid_namespace.c
index b3c7fd554250..baa528d7dfbd 100644
--- a/trunk/kernel/pid_namespace.c
+++ b/trunk/kernel/pid_namespace.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/reboot.h>
+#include <linux/export.h>
 
 #define BITS_PER_PAGE		(PAGE_SIZE*8)
 
@@ -144,6 +145,7 @@ void free_pid_ns(struct kref *kref)
 	if (parent != NULL)
 		put_pid_ns(parent);
 }
+EXPORT_SYMBOL_GPL(free_pid_ns);
 
 void zap_pid_ns_processes(struct pid_namespace *pid_ns)
 {