Remove __ASSUME_SOCK_CLOEXEC / SOCK_CLOEXEC conditionals in Linux-specific code.

This patch removes conditionals on __ASSUME_SOCK_CLOEXEC, and on
SOCK_CLOEXEC being defined, in Linux-specific code, now that all
supported Linux kernel versions can be assumed to have this
functionality.  (The macro is also used in OS-independent code and is
not defined for Hurd.)

Tested x86_64 that the disassembly of installed shared libraries is
unchanged by this patch.

	* nptl/sysdeps/unix/sysv/linux/mq_notify.c: Do not include
	<kernel-features.h>.
	(init_mq_netlink): Remove conditional have_sock_cloexec
	definitions.  Remove code conditional on have_sock_cloexec < 0.
	(init_mq_netlink) [!SOCK_CLOEXEC]: Remove conditional code.
	(init_mq_netlink) [!__ASSUME_SOCK_CLOEXEC]: Likewise.
	* sysdeps/unix/sysv/linux/opensock.c: Do not include
	<kernel-features.h>.
	(__opensock) [SOCK_CLOEXEC]: Make code unconditional.
	(__opensock) [!__ASSUME_SOCK_CLOEXEC]: Remove conditional code.

1 files changed, 1 insertions, 28 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/mq_notify.c b/nptl/sysdeps/unix/sysv/linux/mq_notify.c
index 3138ad2c3c..6893d8ced8 100644
--- a/nptl/sysdeps/unix/sysv/linux/mq_notify.c
+++ b/nptl/sysdeps/unix/sysv/linux/mq_notify.c
@@ -28,7 +28,6 @@
 #include <unistd.h>
 #include <sys/socket.h>
 #include <not-cancel.h>
-#include <kernel-features.h>
 #include <nptl/pthreadP.h>
 
 
@@ -153,41 +152,15 @@ reset_once (void)
 static void
 init_mq_netlink (void)
 {
-#ifdef SOCK_CLOEXEC
-# ifndef __ASSUME_SOCK_CLOEXEC
-  static int have_sock_cloexec;
-# else
-#  define have_sock_cloexec 1
-# endif
-#else
-# define have_sock_cloexec -1
-# define SOCK_CLOEXEC 0
-#endif
-
   /* This code might be called a second time after fork().  The file
      descriptor is inherited from the parent.  */
   if (netlink_socket == -1)
     {
       /* Just a normal netlink socket, not bound.  */
-      if (have_sock_cloexec >= 0)
-	{
-	  netlink_socket = socket (AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, 0);
-#if defined SOCK_CLOEXEC && !defined __ASSUME_SOCK_CLOEXEC
-	  if (have_sock_cloexec == 0)
-	    have_sock_cloexec = (netlink_socket != -1 || errno != EINVAL
-				 ? 1 : -1);
-#endif
-	}
-      if (have_sock_cloexec < 0)
-	netlink_socket = socket (AF_NETLINK, SOCK_RAW, 0);
+      netlink_socket = socket (AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, 0);
       /* No need to do more if we have no socket.  */
       if (netlink_socket == -1)
 	return;
-
-      /* Make sure the descriptor is closed on exec.  */
-      if (have_sock_cloexec < 0
-	  && fcntl (netlink_socket, F_SETFD, FD_CLOEXEC) != 0)
-	goto errout;
     }
 
   int err = 1;