From 074d099ee3d24bff029fc2d1b7162eb9000fbd68 Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Fri, 26 May 1995 16:59:33 +0000
Subject: Only notify the proc server for SIGCHLD when the SA_NOCLDSTOP bit
 actually changes.

---
 sysdeps/mach/hurd/sigaction.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'sysdeps/mach')

diff --git a/sysdeps/mach/hurd/sigaction.c b/sysdeps/mach/hurd/sigaction.c
index 91de02cd17..957068b168 100644
--- a/sysdeps/mach/hurd/sigaction.c
+++ b/sysdeps/mach/hurd/sigaction.c
@@ -52,7 +52,8 @@ DEFUN(__sigaction, (sig, act, oact),
   if (act != NULL)
     ss->actions[sig] = a;
 
-  if (act != NULL && sig == SIGCHLD)
+  if (act != NULL && sig == SIGCHLD &&
+      (a.sa_flags & SA_NOCLDSTOP) != (old.sa_flags & SA_NOCLDSTOP))
     {
       ss->critical_section = 1;
       __spin_unlock (&ss->lock);
-- 
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