#include <linux/taskstats.h>
#include <linux/sched.h>
+#include <net/genetlink.h>
enum {
TASKSTATS_MSG_UNICAST, /* send data only to requester */
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)