diff -urdbB linux-2.4.18-58/fs/ioctl.c linux-2.4.18-59/fs/ioctl.c
--- linux-2.4.18-58/fs/ioctl.c	Fri Feb  9 11:29:44 2001
+++ linux-2.4.18-59/fs/ioctl.c	Thu May  1 09:52:18 2003
@@ -39,6 +39,13 @@
 			return put_user(inode->i_sb->s_blocksize, (int *) arg);
 		case FIONREAD:
 			return put_user(inode->i_size - filp->f_pos, (int *) arg);
+
+                case FIOFLUSH:
+                        write_inode_now(inode, 1);
+                        invalidate_inode_buffers(inode);
+                        invalidate_inode_pages(inode);
+                        return 0;
+
 	}
 	if (filp->f_op && filp->f_op->ioctl)
 		return filp->f_op->ioctl(inode, filp, cmd, arg);
diff -urdbB linux-2.4.18-58/include/asm/ioctls.h linux-2.4.18-59/include/asm/ioctls.h
--- linux-2.4.18-58/include/asm-i386/ioctls.h	Fri Jul 24 11:10:16 1998
+++ linux-2.4.18-59/include/asm-i386/ioctls.h	Thu May  1 09:53:51 2003
@@ -32,6 +32,7 @@
 #define TIOCGSOFTCAR	0x5419
 #define TIOCSSOFTCAR	0x541A
 #define FIONREAD	0x541B
+#define FIOFLUSH	_IO('F', 1) /* flush a file out of the caches */
 #define TIOCINQ		FIONREAD
 #define TIOCLINUX	0x541C
 #define TIOCCONS	0x541D