2.4.1-pre9

 fs

diff -u --recursive --new-file v2.4.0/linux/fs/super.c linux/fs/super.c
--- v2.4.0/linux/fs/super.c   Fri Dec 29 14:18:42 2000
+++ linux/fs/super.c   Mon Jan 15 20:53:11 2001
@@ -54,6 +54,7 @@
 extern int root_mountflags;
 
 static int do_remount_sb(struct super_block *sb, int flags, char * data);
+static int do_remount(const char *dir, int flags, char * data);
 
 /* this is initialized in init/main.c */
 kdev_t ROOT_DEV;
@@ -1025,15 +1026,12 @@
     * call reboot(9). Then init(8) could umount root and exec /reboot.
     */
    if (mnt == current->fs->rootmnt && !umount_root) {
-      int retval = 0;
       /*
        * Special case for "unmounting" root ...
        * we just try to remount it readonly.
        */
       mntput(mnt);
-      if (!(sb->s_flags & MS_RDONLY))
-         retval = do_remount_sb(sb, MS_RDONLY, 0);
-      return retval;
+      return do_remount("/", MS_RDONLY, NULL);
    }
 
    spin_lock(&dcache_lock);