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-rw-r--r--sys/sys/event.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/sys/event.h b/sys/sys/event.h
index 3cf8bce..82764bc 100644
--- a/sys/sys/event.h
+++ b/sys/sys/event.h
@@ -141,6 +141,8 @@ MALLOC_DECLARE(M_KQUEUE);
#define KNOTE_LOCKED(list, hint) knote(list, hint, 1)
#define KNOTE_UNLOCKED(list, hint) knote(list, hint, 0)
+#define KNLIST_EMPTY(list) SLIST_EMPTY(&(list)->kl_list)
+
/*
* Flag indicating hint is a signal. Used by EVFILT_SIGNAL, and also
* shared by EVFILT_PROC (all knotes attached to p->p_klist)
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