1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 6144bab8fd8e..478bad2745e3 100644
--- a/kernel/pid_namespace.c
+++ b/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)
 {