* sysdeps/unix/sysv/linux/kernel-features.h: Define

	__ASSUME_TMPFS_NAME.
	* sysdeps/unix/sysv/linux/shm_open.c [!__ASSUME_TMPFS_NAME]
	(where_is_shmfs): Don't test for obsolete shm filesystem name.

	* sysdeps/unix/sysv/linux/getsysstats.c: Don't search for proc
	mount point.  We assume procfs is mounted at /proc in many other
	places already.

ChangeLog

@@ -1,3 +1,14 @@
+2006-01-16  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/unix/sysv/linux/kernel-features.h: Define
+	__ASSUME_TMPFS_NAME.
+	* sysdeps/unix/sysv/linux/shm_open.c [!__ASSUME_TMPFS_NAME]
+	(where_is_shmfs): Don't test for obsolete shm filesystem name.
+
+	* sysdeps/unix/sysv/linux/getsysstats.c: Don't search for proc
+	mount point.  We assume procfs is mounted at /proc in many other
+	places already.
+
 2006-01-15  Andreas Jaeger  <aj@suse.de>
 
 	[BZ #1950]

sysdeps/unix/sysv/linux/kernel-features.h

@@ -456,3 +456,10 @@
     && defined __arch64__
 # define __ASSUME_STAT64_SYSCALL	1
 #endif
+
+/* Early kernel used "shm" as the filesystem name for the filesystem used
+   for shm_open etc.  Later it is "tmpfs".  2.4.20 is a safe bet for the
+   cutover.  */
+#if __LINUX_KERNEL_VERSION >= 0x02041a
+# define __ASSUME_TMPFS_NAME	1
+#endif

sysdeps/unix/sysv/linux/shm_open.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2000,2001,2002,2003,2004,2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -29,6 +29,8 @@
 #include <bits/libc-lock.h>
 #include "linux_fsinfo.h"
 
+#include <kernel-features.h>
+
 
 /* Mount point of the shared memory filesystem.  */
 static struct
@@ -81,7 +83,10 @@ where_is_shmfs (void)
     /* The original name is "shm" but this got changed in early Linux
        2.4.x to "tmpfs".  */
     if (strcmp (mp->mnt_type, "tmpfs") == 0
-	|| strcmp (mp->mnt_type, "shm") == 0)
+#ifndef __ASSUME_TMPFS_NAME
+	|| strcmp (mp->mnt_type, "shm") == 0
+#endif
+	)
       {
 	/* Found it.  There might be more than one place where the
            filesystem is mounted but one is enough for us.  */