This is a kernel patch against 2.2.1 which you need to apply to

use the code here.

kernel/sysctl/patch-2.2.1

@@ -0,0 +1,81 @@
+diff -ru linux-2.2.1/Makefile hacker/Makefile
+--- linux-2.2.1/Makefile	Sun Jan 31 22:45:42 1999
++++ hacker/Makefile	Sun Mar 21 16:10:41 1999
+@@ -109,6 +109,7 @@
+ DRIVERS		=drivers/block/block.a \
+ 		 drivers/char/char.a \
+ 	         drivers/misc/misc.a
++EXTRAS		=
+ LIBS		=$(TOPDIR)/lib/lib.a
+ SUBDIRS		=kernel drivers mm fs net ipc lib
+ 
+@@ -186,6 +187,11 @@
+ DRIVERS := $(DRIVERS) drivers/net/irda/irda_drivers.a
+ endif
+ 
++ifdef CONFIG_LIBGTOP
++SUBDIRS := $(SUBDIRS) libgtop
++EXTRAS  := $(EXTRAS) libgtop/kernel.o
++endif
++
+ include arch/$(ARCH)/Makefile
+ 
+ .S.s:
+@@ -206,6 +212,7 @@
+ 		$(FILESYSTEMS) \
+ 		$(NETWORKS) \
+ 		$(DRIVERS) \
++		$(EXTRAS) \
+ 		$(LIBS) \
+ 		--end-group \
+ 		-o vmlinux
+diff -ru linux-2.2.1/arch/i386/config.in hacker/arch/i386/config.in
+--- linux-2.2.1/arch/i386/config.in	Sun Jan 31 22:25:25 1999
++++ hacker/arch/i386/config.in	Sat Mar 20 18:26:18 1999
+@@ -84,6 +84,9 @@
+ bool 'System V IPC' CONFIG_SYSVIPC
+ bool 'BSD Process Accounting' CONFIG_BSD_PROCESS_ACCT
+ bool 'Sysctl support' CONFIG_SYSCTL
++if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
++  tristate 'LibGTop support' CONFIG_LIBGTOP
++fi
+ tristate 'Kernel support for a.out binaries' CONFIG_BINFMT_AOUT
+ tristate 'Kernel support for ELF binaries' CONFIG_BINFMT_ELF
+ tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC
+diff -ru linux-2.2.1/include/linux/sysctl.h hacker/include/linux/sysctl.h
+--- linux-2.2.1/include/linux/sysctl.h	Sun Jan 31 22:24:14 1999
++++ hacker/include/linux/sysctl.h	Sat Mar 20 19:12:54 1999
+@@ -56,7 +56,8 @@
+ 	CTL_PROC=4,		/* Process info */
+ 	CTL_FS=5,		/* Filesystems */
+ 	CTL_DEBUG=6,		/* Debugging */
+-	CTL_DEV=7		/* Devices */
++	CTL_DEV=7,		/* Devices */
++	CTL_LIBGTOP=408		/* LibGTop */
+ };
+ 
+ 
+diff -ru linux-2.2.1/kernel/sysctl.c hacker/kernel/sysctl.c
+--- linux-2.2.1/kernel/sysctl.c	Sun Jan 31 22:24:43 1999
++++ hacker/kernel/sysctl.c	Sat Mar 20 19:24:34 1999
+@@ -82,7 +82,9 @@
+ static ctl_table fs_table[];
+ static ctl_table debug_table[];
+ static ctl_table dev_table[];
+-
++#ifdef CONFIG_LIBGTOP
++extern ctl_table libgtop_table[];
++#endif
+ 
+ /* /proc declarations: */
+ 
+@@ -148,6 +150,9 @@
+ 	{CTL_FS, "fs", NULL, 0, 0555, fs_table},
+ 	{CTL_DEBUG, "debug", NULL, 0, 0555, debug_table},
+         {CTL_DEV, "dev", NULL, 0, 0555, dev_table},
++#ifdef CONFIG_LIBGTOP
++	{CTL_LIBGTOP, "libgtop", NULL, 0, 0555, libgtop_table},
++#endif
+ 	{0}
+ };
+