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-rw-r--r--nptl/sysdeps/pthread/pthread_sigmask.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/nptl/sysdeps/pthread/pthread_sigmask.c b/nptl/sysdeps/pthread/pthread_sigmask.c
index 3a3fa351aa..4114e0be2f 100644
--- a/nptl/sysdeps/pthread/pthread_sigmask.c
+++ b/nptl/sysdeps/pthread/pthread_sigmask.c
@@ -34,8 +34,7 @@ pthread_sigmask (how, newmask, oldmask)
   /* The only thing we have to make sure here is that SIGCANCEL is not
      blocked.  */
   if (newmask != NULL
-      && (how == SIG_SETMASK || how == SIG_BLOCK)
-      && sigismember (newmask, SIGCANCEL))
+      && __builtin_expect (__sigismember (newmask, SIGCANCEL), 0))
     {
       local_newmask = *newmask;
       sigdelset (&local_newmask, SIGCANCEL);