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-rw-r--r--nptl/DESIGN-condvar.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/nptl/DESIGN-condvar.txt b/nptl/DESIGN-condvar.txt
index 749180ed4b..7202e414ef 100644
--- a/nptl/DESIGN-condvar.txt
+++ b/nptl/DESIGN-condvar.txt
@@ -34,6 +34,9 @@ cleanup_handler(cv)
   ++cv->wakeup_seq;
   ++cv->woken_seq;
 
+  /* make sure no signal gets lost.  */
+  FUTEX_WAKE(cv->wakeup_seq, ALL);
+
   lll_unlock(cv->lock);
 }