[hurd,commited] hurd: optimize exec cleanup

[Samuel Thibault]

When ports are nul we do not need to request their deallocation. It is
also useless to look for them in portnames.
---
 hurd/hurdexec.c               | 26 ++++++++++++++------------
 sysdeps/mach/hurd/dl-sysdep.c | 26 ++++++++++++++------------
 2 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/hurd/hurdexec.c b/hurd/hurdexec.c
index d5a20cb9b0..0545935d80 100644
--- a/hurd/hurdexec.c
+++ b/hurd/hurdexec.c
@@ -383,19 +383,21 @@ retry:
             exec call.  */
 
          for (i = 0; i < _hurd_nports; ++i)
-           {
-             *pdp++ = ports[i];
-             for (j = 0; j < nportnames; j++)
-               if (portnames[j] == ports[i])
-                 portnames[j] = MACH_PORT_NULL;
-           }
+           if (ports[i] != MACH_PORT_NULL)
+             {
+               *pdp++ = ports[i];
+               for (j = 0; j < nportnames; j++)
+                 if (portnames[j] == ports[i])
+                   portnames[j] = MACH_PORT_NULL;
+             }
          for (i = 0; i < dtablesize; ++i)
-           {
-             *pdp++ = dtable[i];
-             for (j = 0; j < nportnames; j++)
-               if (portnames[j] == dtable[i])
-                 portnames[j] = MACH_PORT_NULL;
-           }
+           if (dtable[i] != MACH_PORT_NULL)
+             {
+               *pdp++ = dtable[i];
+               for (j = 0; j < nportnames; j++)
+                 if (portnames[j] == dtable[i])
+                   portnames[j] = MACH_PORT_NULL;
+             }
 
          /* Pack ports to be destroyed together.  */
          for (i = 0, j = 0; i < nportnames; i++)
diff --git a/sysdeps/mach/hurd/dl-sysdep.c b/sysdeps/mach/hurd/dl-sysdep.c
index 6d52558c24..3cbe075615 100644
--- a/sysdeps/mach/hurd/dl-sysdep.c
+++ b/sysdeps/mach/hurd/dl-sysdep.c
@@ -611,19 +611,21 @@ __rtld_execve (const char *file_name, char *const argv[],
     }
 
   for (i = 0; i < portarraysize; ++i)
-    {
-      *pdp++ = ports[i];
-      for (j = 0; j < nportnames; j++)
-       if (portnames[j] == ports[i])
-         portnames[j] = MACH_PORT_NULL;
-    }
+    if (ports[i] != MACH_PORT_NULL)
+      {
+       *pdp++ = ports[i];
+       for (j = 0; j < nportnames; j++)
+         if (portnames[j] == ports[i])
+           portnames[j] = MACH_PORT_NULL;
+      }
   for (i = 0; i < dtablesize; ++i)
-    {
-      *pdp++ = dtable[i];
-      for (j = 0; j < nportnames; j++)
-       if (portnames[j] == dtable[i])
-         portnames[j] = MACH_PORT_NULL;
-    }
+    if (dtable[i] != MACH_PORT_NULL)
+      {
+       *pdp++ = dtable[i];
+       for (j = 0; j < nportnames; j++)
+         if (portnames[j] == dtable[i])
+           portnames[j] = MACH_PORT_NULL;
+      }
 
   /* Pack ports to be destroyed together.  */
   for (i = 0, j = 0; i < nportnames; i++)
-- 
2.34.1