[hurd,commited 2/7] hurd: drop elder MACH_IPC_COMPAT handling

[Samuel Thibault <samuel dot thibault at ens-lyon dot org>]

This was dropped from GNU Mach in 2006.

	* mach/Machrules (MIGFLAGS): Do not set -DMACH_IPC_COMPAT=0.
	* mach/mach/mach_traps.h: Drop comment about MACH_IPC_COMPAT.
	* sysdeps/mach/hurd/fork.c (__fork): Drop special casing
	MACH_IPC_COMPAT.
---
 ChangeLog                |  4 ++++
 mach/Machrules           |  2 +-
 mach/mach/mach_traps.h   |  3 +--
 sysdeps/mach/hurd/fork.c | 35 +++--------------------------------
 4 files changed, 9 insertions(+), 35 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 4e1e4bf730..7d7800dbb1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -21,6 +21,10 @@
 	--disable-libcilkrts to gcc configure.
 	* sysdeps/mach/hurd/Makefile [$(subdir)==nis]: Add
 	-DUSE_BINDINGDIR=1 to CFLAGS-ypclnt.c.
+	* mach/Machrules (MIGFLAGS): Do not set -DMACH_IPC_COMPAT=0.
+	* mach/mach/mach_traps.h: Drop comment about MACH_IPC_COMPAT.
+	* sysdeps/mach/hurd/fork.c (__fork): Drop special casing
+	MACH_IPC_COMPAT.
 
 2018-01-27  James Clarke  <jrtc27@jrtc27.com>
 
diff --git a/mach/Machrules b/mach/Machrules
index 49e6399b7c..4f9ec421ec 100644
--- a/mach/Machrules
+++ b/mach/Machrules
@@ -51,7 +51,7 @@ $(objpfx)dummy.mk:
 	$(make-target-directory)
 	echo '# Empty' > $@
 
-MIGFLAGS = -DMACH_IPC_COMPAT=0 -DSTANDALONE -DTypeCheck=0 \
+MIGFLAGS = -DSTANDALONE -DTypeCheck=0 \
 	   $(+includes) $(migdefines) -subrprefix __
 # Putting CC in the enivronment makes the mig wrapper script
 # use the same compiler setup we are using to run cpp.
diff --git a/mach/mach/mach_traps.h b/mach/mach/mach_traps.h
index 5e09a95310..cefbd2d372 100644
--- a/mach/mach/mach_traps.h
+++ b/mach/mach/mach_traps.h
@@ -17,8 +17,7 @@
 
 /* Declare the few Mach system calls (except mach_msg, in <mach/message.h>).
    This does not include the kernel RPC shortcut calls (in <mach-shortcuts.h>).
-
-   This file omits the MACH_IPC_COMPAT functions.  */
+   */
 
 #ifndef	_MACH_MACH_TRAPS_H
 
diff --git a/sysdeps/mach/hurd/fork.c b/sysdeps/mach/hurd/fork.c
index fe3f544f2b..b55eecffc6 100644
--- a/sysdeps/mach/hurd/fork.c
+++ b/sysdeps/mach/hurd/fork.c
@@ -213,38 +213,9 @@ __fork (void)
 	    {
 	      /* This is a receive right.  We want to give the child task
 		 its own new receive right under the same name.  */
-	      err = __mach_port_allocate_name (newtask,
-					       MACH_PORT_RIGHT_RECEIVE,
-					       portnames[i]);
-	      if (err == KERN_NAME_EXISTS)
-		{
-		  /* It already has a right under this name (?!).  Well,
-		     there is this bizarre old Mach IPC feature (in #ifdef
-		     MACH_IPC_COMPAT in the ukernel) which results in new
-		     tasks getting a new receive right for task special
-		     port number 2.  What else might be going on I'm not
-		     sure.  So let's check.  */
-#if !MACH_IPC_COMPAT
-#define TASK_NOTIFY_PORT 2
-#endif
-		  assert (({ mach_port_t thisport, notify_port;
-			     mach_msg_type_name_t poly;
-			     (__task_get_special_port (newtask,
-						       TASK_NOTIFY_PORT,
-						       &notify_port) == 0 &&
-			      __mach_port_extract_right
-			      (newtask,
-			       portnames[i],
-			       MACH_MSG_TYPE_MAKE_SEND,
-			       &thisport, &poly) == 0 &&
-			      (thisport == notify_port) &&
-			      __mach_port_deallocate (__mach_task_self (),
-						      thisport) == 0 &&
-			      __mach_port_deallocate (__mach_task_self (),
-						      notify_port) == 0);
-			   }));
-		}
-	      else if (err)
+	      if (err = __mach_port_allocate_name (newtask,
+						   MACH_PORT_RIGHT_RECEIVE,
+						   portnames[i]))
 		LOSE;
 	      if (porttypes[i] & MACH_PORT_TYPE_SEND)
 		{
-- 
2.15.1