1 files changed, 12 insertions, 1 deletions

diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h
index 0ae8f67af1fd..2b6adec3a2e4 100644
--- a/include/linux/taskstats_kern.h
+++ b/include/linux/taskstats_kern.h
@@ -9,6 +9,7 @@
 
 #include <linux/taskstats.h>
 #include <linux/sched.h>
+#include <net/genetlink.h>
 
 enum {
         TASKSTATS_MSG_UNICAST,          /* send data only to requester */
@@ -19,9 +20,19 @@ enum {
 extern kmem_cache_t *taskstats_cache;
 extern struct mutex taskstats_exit_mutex;
 
+static inline int taskstats_has_listeners(void)
+{
+        if (!genl_sock)
+                return 0;
+        return netlink_has_listeners(genl_sock, TASKSTATS_LISTEN_GROUP);
+}
+
+
 static inline void taskstats_exit_alloc(struct taskstats **ptidstats)
 {
-        *ptidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
+        *ptidstats = NULL;
+        if (taskstats_has_listeners())
+                *ptidstats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
 }
 
 static inline void taskstats_exit_free(struct taskstats *tidstats)